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...Rubies are one of the most popular gemstones for traditional jewelry and are very durable. The word ruby comes from ruber, Latin for red. Ruby gets its color from the element chromium. The quality of a ruby ...
... crystal system. In the gem world, all colors of gem-grade corundum other than rubies are called sapphires. The main component of sapphire is alumina (Al2O3). Corundum contains trace elements such as iron (F...
...mineral veins and the refined elegance of sophisticated living into your home. Crafted from rare Rosso Levanto Marble—a treasure carrying hundreds of millions of years of geological memory—its rich, layered ...
... material owing to its high melting point.It occurs naturally in its crystalline polymorphic phase α-Al₂O₃ as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. 2. Featur...