Gemini Birthstone - Emerald |
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Cancer(June 22 - July 22)
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| Emerald fact file | ||
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Crystal Structure: hexagonal Chemical Composition: Beryl - silicate of Beryllium and Aluminum Al2Be3(Si6O18) Hardness: 7.5 to 8 MOHS |
Refractive Index: 1.57 to 1.60 Colors: light to dark green | |
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Gemini are a Mutable sign and their element is Air. These personalities are everything and their opposite. Related Pages:
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