AGTA has granted me permission to copy their Gemstone Enhancement
Manual to my website at gemdata.com
This manual complies with the FTC Guides.
Thank you,
Lance Kanaby
GemData, Mine Design & The Spectrum Network at http://www.gemdata.com
Home of the original interactive “Gem, Mineral & Jewelry Show Calendar”
Colored Gemstones, Diamonds & Cutting Rough Databases and Information
SoLux Daylight Lighting, email Lance Kanaby: mailto:@Lance_Kanaby