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Tumbled Stone Sizes and Shapes

tumbled stone size chart
Our printable tumbled stone size chart illustrates the size of the stones in our tumbled stone mixtures. When printed, it shows the size of extra large, large, medium, small and extra small stones at close to their actual dimensions.

How Big Are Our Tumbled Stones?

To help you understand the size of our tumbled stones before you make a purchase we have created a printable size guide. It illustrates stone sizes at close to their actual dimensions. We believe that it will print from your computer at close to the correct scale. If you want to confirm that, simply get a ruler and compare it to the measurement scale on our document.

We encourange all of our customers to print this chart. It will help you feel comfortable in selecting the proper size stones for your project. Thank you!

We sell tumbled stone mixtures in five different sizes: extra large, large, medium, small and extra small. We also sell single-variety packages of tumbled stones. These are mostly medium size, but a few stone varieties are non-standard sizes.

How Are the Stones Measured?

The stone sizes that we sell are summarized in the table below. This table lists: A) the name of the size; B) the approximate range of stone dimensions for that size (in inches); and, C) the approximate number of stones per pound. This data applies to the tumbled stone mixtures that we sell on our main mixtures page and on our bulk pricing page.

Measuring a stone maximum dimension
This image shows how to measure the maximum dimension of a stone.

Stone Mixture Sizes

Size Approximate Dimensions (Inches) Approximate Stones per Pound
Extra Large 1 1/8 to 2 18 to 25
Large 7/8 to 1 3/8 35 to 50
Medium 5/8 to 1 80 to 100
Small 1/2 to 3/4 150 to 250
Extra Small 5/16 to 5/8 450 to 550

These sizes in the table above are approximate. The size of a stone is determined by measuring it's maximum dimension. This could be measured as a maximum diameter for a round stone, or, the maximum diagonal length for angular and tabular stones. (Please see the accompanying photo.)

Our Stones Are Sized With Screens

All of the stones that we sell are size-sorted by screening. For that reason, you should expect to find some oversize and some undersize stones in any bag of stones that you purchase. However, most of the stones should be within the specified size range. Occasionally, you might find an exceptionally long stone that slipped through the openings of the screen in your package.

Our prices would be a lot higher if we measured each stone by hand - especially for the smallest stone sizes! We hope that you agree that a few mis-sized stones are a small trade-off for a large savings in price. :-)

Purchase a Small Quantity the First Time

If you are uncertain about what size to purchase we recommend purchasing a small, one pound or three pound package to become familiar with the stones. If the size does not suit your needs it is a lot easier and less costly for you to return a small package than it is to return fifty pounds of stones.

If the stones that you receive are not suitable for your intended use, they can be returned for a refund of the purchase price if they are still in their original bag and the bag is unopened. Shipping and handling fees are not refunded or reimbursed if the stones are "as described" on our website and in conformance with what we have described on this page.

How Many Stones Per Pound?

The size table above lists the approximate number of stones that should be contained in one pound of our tumbled stone mixtures. (This information is also on the printable size chart.) For example, packages of medium size usually contain about 75 to 110 stones per pound. These numbers will vary depending upon the shape of the stones and upon their size.

If you are purchasing the single variety stone packages, a few types of stones have a higher-than-average or lower-than-average specific gravity. That means they are heavier or lighter than the typical stone of similar size. For example, dumortierite will have about 50 t0 90 stones per pound, fluorite 60 to 90, hematite 35 to 55, hypersthene 55 to 80, jet 60 to 80, rhodonite 55 to 85, etc. Please read the stone description to know how many stones per pound that you are likely to receive. We provide our best estimates each time we receive new stock from our suppliers.

Uses for Tumbled Stones

We have an article titled "Uses of Tumbled Stones" that shows a few of the many ways that tumbled stones are used. Some of these examples were submitted by our customers and some by our staff. Small and extra small stones are often used in craft projects. Medium stones are the most popular and are used in jewelry, vases, games, potted plants and much more. The larger stones are popular as "give-aways", lucky stones, accents in planters, meditation stones and much more. You will probably think of even more ideas for your stones.