Welcome to Rock Tumbling Recipes!
Rock Tumbling Recipes is an email newsletter published a few times per year by RockTumbler.com. In it we share information to help you enjoy tumbled stones and rock tumbling.
Save Time and Money with a Vibratory Tumbler
Dig for Rocks and Minerals on Your Next Trip
Knowledge and Experience Are Key for Successful Tumbling
Some of Your Tumbled Stones Might Be Fluorescent
A few of the tumbled stones that we sell will fluoresce under ultraviolet illumination. Some specimens of moonstone produce a pink to reddish glow under a short wave UV lamp. Some specimens of ocean jasper produce subtle fluorescent colors under both short and long wave UV illumination. Most specimens of tumbled fluorite produce a blue-violet glow under both short and long wave UV. The white feldspar in dalmatian stone often produces a wonderful pink glow under a short wave UV lamp. The UV lamps used to study rocks and minerals are not the same as the "black lights" that you can purchase at novelty stores such as Spencer Gifts. Those "black lights" emit a lot of visible light which drowns out the subtle fluorescent light produce by most rocks and minerals. In addition, most of the "black lights" do not produce the proper wavelengths needed for rock and mineral studies. You can learn more about fluorescent minerals in an article that we wrote for the Geology.com website. The article has lots of photos of fluorescent rocks and minerals, and even fluorescent geodes. Geology.com also sells books about fluorescent minerals, inexpensive fluorescent lamps, specimens of fluorescent minerals, and UV blocking glasses here. If you have access to a fluorescent lamp, it is really important to wear a pair of safety glasses that block UV radiation -- eye injury can result from too much exposure to UV radiation.