Step 3: Practical Gemology
Gemstone identification is like detective work. You gather clues and eliminate suspects until you’re left with clues that lead to only one suspect … or gemstone. Since few gems share the same refractive index or RI, testing an unknown gem’s RI is a good way to start an investigation. The gem refractometer is the most straightforward and accurate tool for refractive index testing. Our three-part refractometer guide will show prospective gemologists …
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