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 Home » Tumbled Stones » Polished Stone Identification Guide

Picture Identification Guide for Polished Stones and Tumbled Rocks


Printable Tumbled Stone Identification Chart

Amazonite  

Amazonite



Amazonite is a green microcline feldspar. It is named after the Amazon River of South America, where the first commercial deposits were found. The stones shown here are a light green Amazonite that was mined in Mozambique. Shop for Amazonite.
Apache Tears  

Apache Tears



Apache Tears are round nodules of obsidian that polish to a beautiful jet black color. If you hold them up to the light you will see that they are a translucent to transparent glass. These polished Apache Tears were produced from a material found in Arizona (USA). Shop for Apache Tears.
Apricot Agate  

Apricot Agate



Apricot Agate is a banded agate that is named for its apricot pink or orange color. It is a beautiful material with bands of whites, creams, yellows, oranges and pinks. The stones shown here were produced from agate mined in Botswana (Africa). Shop for Apricot Agate.
Banded Amethyst  

Banded Amethyst



Amethyst is the name given to transparent to translucent purple quartz. It often forms in alternating bands with white to clear quartz. The resulting material is called Banded Amethyst or sometimes Chevron Amethyst. The Banded Amethyst used to produce these stones was mined in Namibia (Africa). Shop for Banded Amethyst.
Banded Carnelian  

Banded Carnelian



Carnelian is a translucent orange to red or brown agate. It often forms in alternating bands with white chalcedony. The result is known as Banded Carnelian. These stones were produced from an orange to pink material mined in Botswana (Africa). Shop for Banded Carnelian.
Bloodstone  

Bloodstone



Bloodstone, also known as heliotrope, is a green jasper splashed with small drops of red. The red drops remind many people of blood and that is the source of the name Bloodstone. It has been a popular stone since Biblical times. The Bloodstone shown here was produced from material mined in India.
Blue Chalcedony  

Blue Chalcedony



There are very few blue gemstones. Occasionally the variety of microcrystalline quartz known as chalcedony occurs in a blue color, such as this blue material mined in Namibia (Africa).
Blue Lace Agate  

Blue Lace Agate



Blue Lace Agate is the name given to a chalcedony that consists of alternating bands of white agate and subtle blue to transparent agate. The result is a lacy appearance that looks like blue lace. The Blue Lace Agate shown here was produced from material found in Namibia (Africa). Shop for Blue Lace Agate.
Botswana Agate  

Botswana Agate



Botswana Agate is a name given to a banded agate found in Botswana (Africa). This agate typically has wonderful white, gray and brown banding - sometimes with "eyes" - and takes a very high polish. Shop for Botswana Agate.
Brecciated Jasper  

Brecciated Jasper



"Breccia" is a rock composed of angular fragments. Brecciated jasper consists of jasper fragments cemented together with agate or jasper. The Brecciated Jasper shown here is a bright red material with white, gray and black markings. These stones were produced from material found in South Africa. Shop for Brecciated Jasper.
Carnelian  

Carnelian Agate



Carnelian Agate is a translucent orange to red or brown agate. It has been a popular gemstone since Biblical times. The stones shown here have a bright orange color and a very bright polish. They were produced from agate found in Botswana (Africa). Shop for Carnelian.
Chrysocolla  

Chrysocolla in Quartz



Chrysocolla is a vivid blue to blue-green mineral that contains copper. It often forms in intimate association with quartz or chalcedony to yield a durable gemstone. Chrysocolla is often found associated with copper deposits much like the mineral turquoise. These stones were produced from material mined in Namibia (Africa). Shop for Chrysocolla.
Citrine Quartz  

Citrine Quartz



Citrine is a variety of transparent to translucent quartz that ranges in color from a light yellow through orange to amber brown. Yellow and golden citrine is especially popular. These stones were produced from material found in Brazil. Most citrine quartz is produced by heat-treating Amethyst. Shop for Citrine Quartz.
Citron Chrysoprase  

Citron Chrysoprase



Chrysoprase is a pale green to bright green chalcedony that obtains its green color from inclusions of nickel minerals. Citron Chrysoprase is the name used for material that is on the pale yellowish side of that color range. The stones here were produced from material found in Australia. Shop for Citron Chrysoprase.
Clear quartz  

Clear Quartz



Quartz is one of the most abundant minerals in Earth's crust but clear specimens with very little color and nearly free from inclusions are seldom found. They are known as "clear quartz" or "rock crystal". They capture the light and have a "bright" appearance. Shop for Clear Quartz.
Colored Moonstone  

Colored Moonstone



Moonstone is the name used for stones of orthoclase feldspar with a soft pearly luster, sometimes with adularescence. It occurs in a variety of colors which include: white, cream, pink, brown and gray. These colored moonstones were produced from material found in India. Shop for Colored Moonstone.
Confusionite  

Confusionite



Confusionite is a material that, at least to the observer, is difficult or impossible to identify. No person who possesses an abundant number of polished stones should be ashamed to confess that he can not identify a significant number. These stones can be called "confusionite" to reduce embarrassment.
Agatized Coral  

Coral, Agatized



A rare find is fossil coral that has been replaced by agate - or agatized. This type of fossilization often preserves the structure of the coral individual or colony. The result can be a beautiful stone that can be polished to display cross and lateral sections through the coral fossil.
Crackle quartz  

Crackle Quartz



"Crackle Quartz" is a name used for quartz specimens that have been heat treated and then dyed to change their color. The heat treatment produces fractures in the stone that facilitate the penetration of dyes. Crackle Quartz is sometimes found in our Souvenir Mix.
Dalmatian stone  

Dalmatian Stone



Dalmatian Stone is white to gray igneous rock with black spots. It is given that name because white specimens have a color pattern similar to a Dalmatian dog. Dalmatian Stone is often dyed a variety of colors. Dyed Dalmatian Stone is usually found in our Souvenir Mix.
Dumortierite  

Dumortierite



Dumortierite is a bright blue, dark blue or greenish-blue mineral that is occasionally found in metamorphic rocks. It can be polished to a high luster and is one of just a few blue minerals that are hard enough to be used as a gemstone. The stones shown here were produced from material mined in Mozambique (Africa). Shop for Dumortierite.
Dyed agate  

Dyed Agate



Agate is a variety of chalcedony that can be extremely colorful but usually is not. It is slightly porous, with some bands and zones being more porous than others. When heat treated and exposed to dye, the porous zones absorb more dye than the less porous, producing a stone that is banded with various color intensities.
Eye agate  

Eye Agate



"Eye agates" are rare agate specimens that have perfectly circular markings or "eyes". These are actually three-dimensional features that extend into the stone in the shape of a hemisphere. Sometimes eye agate has concentric or "bull's eye" color zones. Lake Superior and Botswana agates frequently display eyes.
Fluorite  

Fluorite



Fluorite occurs in a variety of colors that frequently includes purple, green, yellow, blue and clear, that are often banded. It often has a wonderful fluorescence. Although it is beautiful it is not especially well suited for use in jewelry and certain crafts because it has a hardness of four and has perfect cleavage in four directions.. Shop for Fluorite.
Granite  

Granite



Granite is an intrusive igneous rock that is composed of quartz and feldspar with minor amounts of micas, amphiboles and other minerals. It can be pink, white or gray in color. Although the minerals in granite have various hardnesses, it can easily be tumbled into attractive stones. Here are a few granites that we tumbled.
Green Aventurine  

Green Aventurine



Aventurine is a translucent quartz that contains inclusions of platy minerals such as muscovite mica, hematite or goethite. The inclusions interact with light entering the stone to produce a glistening known as "aventurescence." These light green stones were produced from material found in Zimbabwe (Africa). Shop for Green Aventurine.
Green Moss Agate  

Green Moss Agate



Moss agate is a translucent to transparent chalcedony that contains visible inclusions with a mossy or dendritic shape. The moss agate shown here has dark green inclusions. These stones were produced from material found in India. Shop for Green Moss Agate.
Hematite  

Hematite



Hematite is an iron oxide mineral with a bright red or silver color. It is has a specific gravity that is about double that of the typical gemstone - thus it feels very heavy. The hematite shown here has a bright silver metallic luster. These stones were produced from hematite found in Brazil. Shop for Hematite.
Howlite  

Howlite



Howlite is a silicate mineral found in evaporite deposits. It usually has a white or gray color that is cut by gray to black veins. It is porous and readily accepts dye (see below). Its white color allows it to accept dye with very predictable color results. Howlite is sometimes found in our tumbled stone mixtures.
Howlite  

Howlite - Dyed



Howlite is one of the most commonly dyed lapidary materials. It is often dyed to produce the bright colors that are not often found in natural stones. Howlite dyed blue is a popular substitute for turquoise. Dyed Howlite is usually found in our Souvenir Mix.
Kambamba Jasper  

Kambamba Jasper



Kambamba Jasper is a dark green orbicular jasper that takes a nice polish and is found in Madagascar. The Kambamba jasper shown here is a dark green material with green to black circular markings (orbs). Kambamba is also known as "crocodile stone" because the markings on it remind some people of crocodile skin. Shop for Kambamba Jasper.
Labradorite  

Labradorite



Labradorite is a variety of plagioclase feldspar that often exhibits bright flashes of electric yellow, green or blue when played in the light. This phenomenon is unique to the mineral and has been named "labradoresence". It is one of our favorite tumbled stones. Shop for Labradorite.
Lapis Lazuli  

Lapis Lazuli



Lapis Lazuli is a gemstone that has been popular since Biblical times. Lapis is one of just a few blue gemstones. It often contains white calcite veins and sparkles of gold-colored pyrite. The stones shown here have a bright blue color and were produced from material mined in Chile. Shop for Lapis Lazuli.
Leopard Skin  

Leopard Skin



Leopard Skin looks like its name. It is a cream to tan to pink rhyolite with black, white, red, or tan markings in a color pattern that resembles the fur of a leopard. It is a popular gemstone that polishes well. These stones were produced from material mined in Mexico. Shop for Leopard Skin.
Lepidolite  

Lepidolite



Lepidolite is a variety of mica that occurs in a spectrum of colors that range from pink to deep lavender. The stones shown here are tumbled quartz pebbles that have enough lepidolite inclusions to yield pink and lavender gemstones.
Lilac Amethyst  

Lilac Amethyst



Amethyst is a purple variety of crystalline quartz that can be transparent through translucent. When it has a soft purple color it is often called "lilac amethyst". The stones shown here were produced from material mined in South Africa. Shop for Lilac Amethyst.
Lodestone  

Lodestone



Lodestone has amazed people for thousands of years because it is a natural magnet. When suspended on a string, it will orient itself with Earth's magnetic field. It has a silver metallic luster and is a variety of the iron ore magnetite. These specimens were found in the United States.
Malachite  

Malachite



Malachite is a green copper carbonate mineral. It often displays swirled and banded patterns in shades of light through dark green. It is a very heavy material because of its high copper content. These stones were produced from malachite mined in Zaire (Africa).
Montana Moss Agate  

Montana Moss Agate



Montana Moss is a transparent to translucent agate with brown and black mossy inclusions. The base color ranges from clear through milky to amber brown. It is named after the State of Montana where it is found at many locations and is a popular rough with lapidaries.
Mookaite  

Mookaite



Mookaite is silicified radiolarian siltstone that is found in Western Australia. Many specimens of Mookaite can accept a very high polish. It is widely known for its spectacular contrasting color patterns of yellows, creams, reds and maroons. Shop for Mookaite.
Ocean Jasper  

Ocean Jasper



Ocean Jasper, sometimes called "orbicular jasper," is a silicified rhyolite or tuff that contains "eyes" formed from radial quartz and feldspar crystals. It occurs in a variety of colors, but green, yellow, white, pink and cream color patterns are very common. It often has an amazing fluorescence. Shop for Ocean Jasper.
Orange Quartz  

Orange Quartz



Quartz naturally occurs in almost every color of the spectrum. These colors are caused by impurities in the quartz crystal. This gemmy orange quartz in a beautiful "peach" color was produced from a mine in India. Shop for Orange Quartz.
Petrified Wood  

Petrified Wood



Petrified wood forms when plant debris is buried and then replaced by mineral material such as chalcedony or opal. This often occurs when a forest is buried under a volcanic ash fall. When polished these pieces of wood often display interesting grain patterns that can sometimes be linked to a specific type of plant. Shop for Petrified Wood rough.
Arizona petrified wood  

Petrified Wood (Arizona)



Petrified wood is found at many localities worldwide. The most famous are in the state of Arizona (USA). Much of the petrified wood found there is various shades of red without distinctive wood grain. It is sometimes found as logs or tree segments. Most is found as small pieces scattered on the surface or in dry washes. Shop for Arizona Petrified Wood.
Orthoclase  

Orthoclase



Orthoclase is a very common mineral of the feldspar family. It often has a pleasing peach color and soft pearly luster. Surprisingly orthoclase has not received the same level of lapidary attention as amazonite - another feldspar mineral with an interesting color. It has right angle cleavage and often breaks into interesting shapes.
Picasso Stone  

Picasso Stone



"Picasso stone" reminds many people of the interesting art style of the famous painter, Pablo Picasso. It is a beautiful material with angular patterns in gray, brown, black, cream, white and other colors. These stones were produced from material found in Utah (USA). Shop for Picasso Stone.
Picture Jasper  

Picture Jasper



Picture Jasper is a material marked with colors and patterns that look like "landscape" scenes - thus the name "picture jasper." If you study a stone you will often find interesting "pictures" of landscapes and deserts. These stones were produced from material found in Namibia (Africa). Shop for Picture Jasper.
Pink Aventurine  

Pink Aventurine



Aventurine is a quartz with abundant inclusions of platy minerals such as mica. The inclusions reflect and scatter light within the stone to produce a glittering phenomenon known as "aventuresence." The pink stones shown here were produced from material mined in Canada. Shop for Pink Aventurine.
Pink Botswana Agate  

Pink Botswana Agate



"Botswana agate" is the name given to banded agates produced in the country of Botswana (Africa). Some of these stones occur in a gray through creamy pink color. These are known as "Pink Botswana." Shop for Pink Botswana Agate.
Pink Opal  

Pink Opal



Pink opal is a variety of common opal that is rarely seen as a tumbled stone. It can be a beautiful material even though it lacks the "play of color" exhibited by precious opal. These specimens were mined in Peru, a country that is well known for producing pink opal.
Prehnite  

Prehnite



Prehnite is a yellow to green silicate mineral that is occasionally found in igneous and metamorphic rocks. The specimens used as gemstones generally are transparent to translucent with a pleasing yellow-green color. The stones shown here were produced from material mined in South Africa. Shop for Prehnite.
Red Jasper  

Red Jasper



Jasper is an opaque chalcedony and red is one of its most common colors. This red jasper from South Africa has a fire-engine red color that in some stones is interrupted by a white to transparent quartz vein. It often accepts an exceptionally high polish. Shop for Red Jasper.
Rhodonite  

Rhodonite - Pink



Rhodonite is a metamorphic manganese mineral that is well known for its beautiful pink color. It is often found as nodules that are cut by abundant black veins of other manganese minerals. The material used to produce these stones was mined in Canada. Shop for Rhodonite.
Raspberry rhodonite  

Rhodonite - Raspberry



Raspberry rhodonite is a bright pink variety of the manganese mineral, rhodonite. It is a metamorphic mineral with a gemmy pink color that is often interrupted by veins of black manganese oxide. The specimens shown here were found in Madagascar. Shop for Raspberry Rhodonite.
Rose Quartz  

Rose Quartz



Rose quartz is a transparent to translucent variety of crystalline quartz with a soft pink color. It takes a very high polish and is an exceptionally popular semiprecious stone. The material used to produce these stones was mined in Namibia (Africa). Shop for Rose Quartz.
Ruby in Zoisite  

Ruby in Zoisite



Zoisite is a mineral that is rarely found in metamorphic rocks. Even more rarely it contains bright red corundum crystals (rubies). This bright green zoisite mined in Tanzania (Africa) contains occasional red rubies a few millimeters in diameter.
Snowflake Obsidian  

Snowflake Obsidian



Obsidian is a natural volcanic glass that can be polished to a very high luster. Some stones of obsidian contain white crystals of the mineral cristobalite. When polished these stones produce a gemstone known as snowflake obsidian. Shop for Snowflake Obsidian.
Sodalite  

Sodalite



Blue rocks and minerals are rare and that is what makes sodalite an interesting mineral. It is an igneous mineral named for its sodium content. It typically occurs in a range of blue hues but white and pink colors are also common. Shop for Sodalite.
Sunstone  

Sunstone



Sunstone is a plagioclase feldspar that contains abundant inclusions of platy minerals such as mica or metals that sparkle in reflected light. This sparkling luster is known as aventurescence. These specimens of sunstone were mined in India. Shop for Sunstone.
Blue Tigers Eye  

Tigers Eye - Blue



Tigers Eye receives its name from how reflected light forms a band that crosses the stone at a right angle to linear structures within the stone. Although the most popular Tigers Eye is golden to brown in color, it also occurs in other colors such as this deep blue material found in South Africa. Shop for Blue Tigers Eye.
Gold Tigers Eye  

Tigers Eye - Gold



Tigers Eye receives its name from how reflected light forms a band that crosses the stone at a right angle to linear structures within the stone. The Tigers Eye shown here is the popular golden to brown colors that are typical for this gemstone. These stones were produced from material found in South Africa. Shop for Gold Tigers Eye.
Red Tigers Eye  

Tigers Eye - Red



The Tigers Eye most often seen is a honey to golden brown color; however, it is sometimes heat-treated to produce the deep reddish color shown in these stones. These stones were produced from material found in South Africa. Shop for Red Tigers Eye.
Tree Agate  

Tree Agate



Tree agate is a name used for a white chalcedony that has green dendritic markings. It is a very popular material used to make beads, cabochons and tumbled gemstones. The stones shown here were produced from material mined in Botswana. Shop for Tree Agate.
Unakite  

Unakite



Unakite is an igneous rock that contains mostly green epidote and pink orthoclase, but with minor amounts of quartz and other minerals. It is often polished to produce an interesting gemstone. The stones shown here were produced from material mined in South Africa. Shop for Unakite.
White Moonstone  

White Moonstone



Moonstone is the name used for stones of orthoclase feldspar with a soft pearly luster, sometimes with adularescence or fluorescence. These white to cream-color stones have a nice pearly luster and bright polish. They were produced from moonstone mined in India. Shop for White Moonstone.
White Quartz  

White Quartz



White quartz is one of Earth's small number of ubiquitous minerals - that means it is found almost everywhere. Perhaps it is rarely polished because it is so common that it is overlooked. However, it is a beautiful tumbled stone that works nicely in jewelry and craft projects. Shop for White Quartz.
Yellow Jasper  

Yellow Jasper



Yellow Jasper is an opaque yellow to yellow-brown-beige chalcedony that can be polished to a very high luster. These stones, produced from material mined in South Africa, show some dark brown to cream color zones that produce a scenic pattern. Shop for Yellow Jasper.
Yellow Quartz  

Yellow Quartz



Yellow Quartz is a translucent to transparent quartz with a light to deep yellow color. These translucent stones were produced from material mined in India and have a very bright polish. Shop for Yellow Quartz.
Gemstones of the World  

Gemstones of the World



Gemstones of the World (fifth edition) by Walter Schumann is one of the most popular gemstone books ever written. Over one million copies have been sold. It has about 100 pages of basic gemstone information and about 200 pages dedicated to photos and descriptions of over 100 gems and gem materials. It contains about 1900 photos of gemstones in rough and cut states. It is an easy-to-understand book written for people who have no previous training in geology or gemology. High school age and up. Get your copy of Gemstones of the World.