Buyer's guide
Iolite
Iolite's most valued color is a saturated violet to blue. Inclusions usually lower its value.
What to look for
Color
Vivid violet to blue. The cutter orients it so the best color faces up.
Clarity
Eye clean is most valuable. Rare cat's-eye stones are loved by collectors.
Cut
Strong color shifts plus cleavage make it a careful cut.
Carat
Found in a good range of sizes.
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