Ruby, also called corundum, is an extremely hard (Moh hardness 9) aluminum oxide with a hexagonal crystal system. It is the red variety of corundum as well as one of the primary varieties, along with Sapphire. Ruby’s color range includes red, reddish-pink, and blood orange red but can sometimes be found in blue and green varieties. The bold and intense red color is caused by chromium, a rare periodic element. Ruby was named after the Latin word meaning “red”. It is primarily found in Burma, India, Brazil, Thailand, Sri Lanka, and throughout the USA.
This item is 1.75" x 1.75" and weighs 4.4 oz.
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