29 Terms
Contributors in General jewelry
General jewelry
refractive index
Jewelry; General jewelry
Measures the slowing down and bending of light rays as they enter a gemstone. Maybe used to identify gem species.
surface mining
Jewelry; General jewelry
Mining that takes place when the stones can be found close to the surface. This type of mining entails little heavy equipment as only the soil and overlying mineral deposits are removed. Surface ...
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Category: Entertainment 3 29 Terms
29 Terms