Gemology: the science of gem materials.

Chrome Tourmaline, 2.4 cm, 7.63 cts, Tanzania William Larsen Collection Photo: Jeff Scovil, used with permission.	Gemology Gemology: in Pursuit of a Passion Researchers, Authors and Adventurers Resources and Education Visual Optics & Affordable Gemology Gemology Tools and Equipment Goldsmiths and Lapidaries Viking Sunstone: Underlying Science Thailand Mining and Cutting Quartz
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