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RUBY
the red variety of corundum

VARIETY INFORMATION:

  • VARIETY OF: Corundum , Al2O3 .
  • USES: Gemstone.
  • BIRTHSTONE FOR: July
  • COLOR: various shades of red.
  • INDEX OF REFRACTION: 1.76 - 1.78
  • BIREFRINGENCE: 0.009
  • HARDNESS: 9
  • CLEAVAGE: none, although there is a rhombic parting
  • CRYSTAL SYSTEM: trigonal
  • PLEOCHROIC: strongly
  • For natural ruby mineral specimens see our For Sale or Sold lists
    For Ruby Jewelry, see -->  RUBY JEWELRY

Ruby is the red variety of corundum, the second hardest natural mineral known to antiquity. The non-red variety of corundum is Sapphire. Sapphires are well known among the general public as being blue, but can be nearly any color. The red color in ruby is caused by trace amounts of the element chromium. The best shade of red for ruby is often given the name "pigeon blood red", but ruby can be any shade of red up to almost pink.

Oriented rutile crystal inclusions cause a six-rayed-star light effect (called asterism) to form the popular Star Ruby.

Rubies come from all over the world but good gemstones are found at Thailand, India, Madagascar, Zimbabwe, North Carolina in the U.S., Afghanistan, Pakistan, Sri Lanka, Kenya, Tanzania, Kampuchea, and perhaps most notably, Burma.

Rubies have a famous place in science - the first lasers were made from artificial ruby crystals.  They still are used for this purpose although other materials offer improved efficiency.  Some ruby crystals show the fluorescence (actually very short term phosphorescence) that makes a laser possible.

Ruby Jewelry - Hover over an item for more information
"14k White Gold Diamond And .83ct. Ruby Ring."
"Charming 14k white gold diamond and ruby ring with 0.23ct diamonds and 0.23ct ruby and the measurement is . 5.57 mm height"Only $200.00 at Sarraf Jewelry
no photo"14k White Gold Diamond And .83ct. Ruby Ring."
$200.00
Sarraf Jewelry
"14k Gold Ladies Marquise shaped Synthetic Ruby Ring"
"14K Gold ladies Wide Band Prong-Set Cubic Zirconia ring; measures 15mm W at its widest point."Only $323.00 at Sarraf Jewelry
no photo"14k Gold Ladies Marquise shaped Synthetic Ruby Ring"
$323.00
Sarraf Jewelry
Ruby Corundum & Amethyst Ring - Dina Mackney
This season, plummy hues are making news. Broadcast your sartorial savvy with this Dina Mackney ring. 18-karat yellow gold vermeil. Amethyst cabochon center. Trimmed with ruby corundum. US ring size 7. Made in USA of imported materials.Only $598.00 at Neiman Marcus
no photoRuby Corundum & Amethyst Ring - Dina Mackney
$598.00
Neiman Marcus
Sterling Silver Ruby Bracelet Jewelry
This Bracelet was handmade by a master artisan and is one of a kind.Only $157.49 at JeGem.com
no photoSterling Silver Ruby Bracelet Jewelry
$157.49
JeGem.com
.60 carat Round Genuine Ruby with Diamond Accents 10k Yellow Gold Heart Pendant
Rated by 25,000+ Customers. .60 TCW Round Genuine Ruby with Diamond Accents 10k Yellow Gold Heart PendantOnly $189.99 at PalmBeachJewelry
no photo.60 carat Round Genuine Ruby with Diamond Accents 10k Yellow Gold Heart Pendant
$189.99
PalmBeachJewelry
Ross-Simons 2.20 ct. t.w. Ruby Earrings in 14kt White Gold
A wonderful pair of earrings in rich red ruby. Rubies total 2.20 ct. t.w. dangle with delight. Leverback earrings are set in polished 14kt white gold. Ruby birthstones are the perfect gift for July birthdays.Only $446.25 at Ross-Simons
no photoRoss-Simons 2.20 ct. t.w. Ruby Earrings in 14kt White Gold
$446.25
Ross-Simons
"14k Gold Ladies synthetic Ruby and Synthetic Diamonds Flower Cocktail Ring 12mm Wide"
"14K Gold ladies CZ Flower cocktail ring; measures 12mm W at its widest point."Only $211.00 at Sarraf Jewelry
no photo"14k Gold Ladies synthetic Ruby and Synthetic Diamonds Flower Cocktail Ring 12mm Wide"
$211.00
Sarraf Jewelry
Engraved Hearts And Kisses Ruby And Diamond Ring Romantic Jewelry Gift For Her
Engraved Hearts And Kisses Ruby And Diamond Ring Romantic Jewelry Gift For Her - Give kisses from the heart and say you'll love her always with this stunning engraved ruby and diamond heart ring, available exclusively from The Bradford Exchange....Only $498.00 at The Bradford Exchange Online
no photoEngraved Hearts And Kisses Ruby And Diamond Ring Romantic Jewelry Gift For Her
$498.00
The Bradford Exchange Online
Sterling Silver CZ, Ruby Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $182.24 at JeGem.com
no photoSterling Silver CZ, Ruby Ring Jewelry
$182.24
JeGem.com
"14k Gold Ladies Synthetic Ruby Synthetic Diamond Flower Cocktail Ring 11mm Wide"
"14K Gold ladies CZ Flower cocktail ring; measures 11mm W at its widest point."Only $219.00 at Sarraf Jewelry
no photo"14k Gold Ladies Synthetic Ruby Synthetic Diamond Flower Cocktail Ring 11mm Wide"
$219.00
Sarraf Jewelry
Sterling Silver Ruby, Emerald Flower Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $196.49 at JeGem.com
no photoSterling Silver Ruby, Emerald Flower Ring Jewelry
$196.49
JeGem.com
Ruby Gemstone Ring with Diamonds in 10K White Gold
Ruby Gemstone Ring with Diamonds in 10K White Gold #08CC05169RUW. Sleek, modern elegance radiates from this stunning gemstone ring. A rich 5x4mm ruby glows in the flowing embrace of lustrous 10 karat white gold. Two crisp diamonds add fire and...Only $169.00 at MyJewelryBox.com
no photoRuby Gemstone Ring with Diamonds in 10K White Gold
$169.00
MyJewelryBox.com
"14k Gold Ladies synthetic Ruby Cz Flower Cocktail Ring 16mm Wide"
"14K Gold ladies CZ Flower cocktail ring; measures 16mm W at its widest point."Only $219.00 at Sarraf Jewelry
no photo"14k Gold Ladies synthetic Ruby Cz Flower Cocktail Ring 16mm Wide"
$219.00
Sarraf Jewelry
Sterling Silver Fire Star Ruby Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $124.49 at JeGem.com
no photoSterling Silver Fire Star Ruby Ring Jewelry
$124.49
JeGem.com
Sterling Silver Lizard Toggle Wrap Bracelet, Ruby - JvdF
Sterling silver toggle clasp with JvdF logo. Ring lizard skin bands wrap twice around wrist. Contrasting silk loop. Handmade in USA.Only $285.00 at Neiman Marcus
no photoSterling Silver Lizard Toggle Wrap Bracelet, Ruby - JvdF
$285.00
Neiman Marcus

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