Gemstones with RI 1.460

4 gemstones have a refractive index range that includes 1.460. Refractive index measures how much light bends when entering a gem — it's one of the most diagnostic properties for identification. Measured with a gemological refractometer.

← All RI Values

GemstoneRI RangeSG RangeCrystal SystemOptic Character
Black Opal1.440 – 1.4602.09 – 2.16AmorphousSR
Fire Opal1.370 – 1.4701.98 – 2.20AmorphousSR
Opal1.370 – 1.4701.98 – 2.25AmorphousSR
Chrysocolla1.460 – 1.6302.00 – 2.40AmorphousAGG
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