What is the approximate refractive index range of moissanite?

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Study for the DCA Gemology Test. Utilize flashcards and multiple-choice questions, each question offering hints and explanations. Prepare effectively for your exam with confidence!

Multiple Choice

What is the approximate refractive index range of moissanite?

Explanation:
Moissanite has a very high refractive index, which describes how much light slows and bends when entering the material. This high index contributes to its strong brilliance and fire. For moissanite, the refractive index sits in the range of about 2.65 to 2.69, which is higher than diamond (around 2.42) and much higher than typical glass (about 1.5). That makes moissanite sparkly and noticeable in reflections. The other ranges are less accurate: 2.60 to 2.62 is a bit low for moissanite’s typical value, 2.40 to 2.45 is closer to diamond, and 1.50 to 1.60 is characteristic of ordinary glass. Therefore, 2.65 to 2.69 is the correct range.

Moissanite has a very high refractive index, which describes how much light slows and bends when entering the material. This high index contributes to its strong brilliance and fire. For moissanite, the refractive index sits in the range of about 2.65 to 2.69, which is higher than diamond (around 2.42) and much higher than typical glass (about 1.5). That makes moissanite sparkly and noticeable in reflections. The other ranges are less accurate: 2.60 to 2.62 is a bit low for moissanite’s typical value, 2.40 to 2.45 is closer to diamond, and 1.50 to 1.60 is characteristic of ordinary glass. Therefore, 2.65 to 2.69 is the correct range.

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