You can find information regarding enhancements for gemstone beads and cabochons in the ''Gemstone Treatment Guide''. There are many different types of stone grading systems in the world today. There are well established and respected standards for diamonds; however, there are few accepted and respected standards for other gemstones. The ''Gemstone Treatment Guide'' was developed by the American Gem Trade Association (AGTA)--of which Fire Mountain Gems is a charter member--to encourage enhancement disclosure in the gemstone trade. The AGTA scale starts with 'A' as the highest quality and works down the alphabet as the quality decreases (so a 'B' grade emerald will be more valuable than a 'D' grade emerald).
A gemstone is considered dyed, by AGTA guidelines, when coloring matter has been introduced into the stone to give it new color, intensify its present color or improve its color uniformity. According to AGTA, a gemstone is considered heated when heat is used to create a change in color, clarity and/or phenomena. A gemstone is considered stabilized when a colorless bonding agent (commonly plastic) is used to give a porous gemstone added durability and improve its appearance.
For information about specific gemstone materials, see our Gem Notes information section. It contains images of a wide selection of gemstones and includes design possibilities, gemstone histories and believed metaphysical properties for your convenience.
Products sold by Fire Mountain Gems and Beads® are intended for experienced jewelry-makers and designer-artists; children 14 years of age or younger should use these products with adult direction.
Fire Mountain Gems and Beads, Inc. - One Fire Mountain Way, Grants Pass, OR USA
Copyright 2008-2017 Fire Mountain Gems and Beads, Inc. All rights reserved.
Fire Mountain Gems and Beads reserves the right to make policy changes at any time without prior notice.