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Cambodian-Thai Ruby
Four Pinctada maculata bead-cultured blister pearls
Rough and cut sapphires
Blue Sapphires
Synthetic Ruby Overgrowth on Natural Corundum
Unheated faceted and rough rubies weighing from 0.9 to 5.4 carats from Niassa
This 2.14 ct “Fancy red” oval-cut diamond was produced through a multi-step treatment process.
Natural malachite, like the analyzed material shown here, is well known for its bright green color and distinctive banded structure.

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Gems & Gemology
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