| Birthstone for July: Ruby |
| Jenny Andersen Antique and Estate Jewelry |
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Ruby is red corundum, the hardest gemstone except for diamond.
Corundum comes in all colors, but the red, pink, and purplish-red ones are
termed ruby; all other colors are sapphire. Corundum is aluminum oxide,
and the red color comes from small amounts of chromium and iron in the
crystal.
In the past, all red stones were called rubies. The Black Prince's Ruby in the
crown jewels of England, is actually a red spinel.
Red ruby is the color of passionate love, and is very popular as an
engagement ring.
Care of ruby: Although rubies are extremely hard and resistant to
scratching, they can be chipped, so some care is needed. Ultrasound and
steam cleaning are safe [except for treated stones], and ruby is resistant to
most chemicals. However, the old standby of sudsy water works just fine!
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