Distinguishing Between Dust, Scratches, Reflections, and Inclusions
A spark seems to be inside a gem and disappears when the stone is…
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Examining an Unknown Stone in the Field: A Practical Routine
When you encounter a stone you don’t recognize, your natural instinct will be to…
How to Position and Focus a 10x Loupe When Examining a Gemstone
Select a clean specimen stone, place it in the tips of gem tweezers, lift…
Why Gemstone Color Is Not Enough for Reliable Identification
The colour of a gemstone is not a sufficient basis for identification. A red…