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A Corundum.
The name corundum has its origin in India. Gem quality Red Corundum is called Ruby. The shade varies from Pinkish to Brownish Red depending on chromium and Iron content. The color intensity is influenced by Chromium percentage. Transparent Ruby is very rare. Heat treatment is commonly used to improve color. |
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Ruby is tough Mineral second only to Diamond in Hardness. It is the favorite of those in Power and Love. |
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Ruby Properties
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Chemical Composition
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Density
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Hardness
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Origin
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Refractive Index
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Al2 O3
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3.96 - 4.01
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9
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Burma / Thailand
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1.76 - 1.78
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