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Ruby Jewelry or Ruby Gemstone is classified into the Precious Gemstones category and is one of the
most popular gemstones too. The colors vary from light to dark
red. Ruby has a Moh's hardness of 9 and is the hardest gemstone
after diamond (moh's hardness 10). Ruby and Sapphire are part of the
corundum mineral species. Corundums that are not suitable for jewelry making
are used in cutting and polishing materials.
Rough ruby stones
appear quite dull but when cut and polished, it provides beautiful
glittering luster. The popular ruby deposits are found in Burma,
Thailand, Africa, Sri Lanka.