Specialty Stones9 min read
A parti sapphire holds two or more distinct colours in a single crystal, split by a visible boundary no two stones share. Here is how the zoning forms, how Ceylon parti compares to Australian, how it differs from a teal, and what to look for when buying one.
Specialty Stones10 min read
September's birthstone is sapphire, but sapphire is not only blue. Fancy sapphires in yellow, pink, violet, and green, parti-coloured sapphires that split between two hues, and rare non-corundum Sri Lankan stones all qualify. Here is how to pick the right one.
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