Friday, April 29, 2011

Gemstone of the Week: Ruby

("Kelleigh" by Handmaden Designs)

Ruby is the red variety of Corundum.  It is a hardness 9 (tied with sapphire, another corundum) and second only to diamond in hardness.  Some of the best quality rubies come out of Mogok, Burma/Myanmar. There is a variety of shades of red in which rubies can come.  They can be orangy-red to purplish-red.  There is a lot of disagreement over which is the best colour, but the one thing that is agreed on is that the stones should have as little black, gray, or brown as possible.  Ruy value varies depending on the size and quality of the stone,   and can range from as much as $200,000 a carat for large stones to $3,000-$4,000 a carat for smaller stones.  Opaque rubies can as low as $10 a carat.

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