Gemstones with RI 1.525

6 gemstones have a refractive index range that includes 1.525. 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
Amazonite1.514 – 1.5302.54 – 2.58TriclinicDR_B-
Moonstone1.518 – 1.5262.56 – 2.59MonoclinicDR_B-
Chrysocolla1.460 – 1.6302.00 – 2.40AmorphousAGG
Coral1.486 – 1.6582.60 – 2.70AggregateAGG
Lapis Lazuli1.500 – 1.6702.70 – 2.90AggregateAGG
Pearl1.520 – 1.6902.60 – 2.85AggregateAGG
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