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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
Ross-Simons 1.65ct Ruby, .15ct t.w. Diamond Pendant Necklace in Gold. 16"
Turn up the heat on your style meter with this high-impact 1.65 carat ruby and and .15 ct. t.w. diamond pendant necklace! This gorgeous, graceful pear-shaped ruby dazzles in an icy frame of diamond rounds with fabulous results! Note the pretty...Only $746.25 at Ross-Simons
no photoRoss-Simons 1.65ct Ruby, .15ct t.w. Diamond Pendant Necklace in Gold. 16"
$746.25
Ross-Simons
Love Bezel-Ruby Pendant Necklace - SHY by Sydney Evan
14-karat yellow gold-plated sterling silver vermeil necklace. Love script pendant; bezel-set ruby on chain. Delicate cable chain necklace, 15 1/4-16 1/4inL. 0.015 total ruby carat weight. Spring-ring clasp. Imported.Only $125.00 at Neiman Marcus
no photoLove Bezel-Ruby Pendant Necklace - SHY by Sydney Evan
$125.00
Neiman Marcus
Firework Bracelet, Ruby Red - Oscar de la Renta
Your celebratory spirit is suited to standout pieces-wear this Oscar de la Renta firework bracelet in lieu of a minimalist bangle. Brass with colorful enamel fill. Firework ornaments with pave crystals and resin cabochon centers. Hinged; magnetic...Only $357.00 at Neiman Marcus
no photoFirework Bracelet, Ruby Red - Oscar de la Renta
$357.00
Neiman Marcus
Ross-Simons .60ct t.w. Ruby, .65ct t.w. White Topaz Multi-Row Ring in Silver
A gorgeous .60 ct. t.w. ruby and .65 ct. t.w. white topaz ring with a multi-row design for an absolutely unforgettable statement of sophistication! Polished sterling silver ring. Ruby birthstones are the perfect gift for July birthdays.Only $100.00 at Ross-Simons
no photoRoss-Simons .60ct t.w. Ruby, .65ct t.w. White Topaz Multi-Row Ring in Silver
$100.00
Ross-Simons
6.59 CTW Ruby Sterling Silver Ring
Product Type:Ring condition:brand new material:sterling silver color:silver quality:925 total item weight:6.1g gemstone:cubic zirconia quantity/ctw: shape:round color:white gemstone:Created ruby quantity/ctw:1/6.59ctw shape:checkerboard color:red...Only $164.00 at www.gemroc.com
no photo6.59 CTW Ruby Sterling Silver Ring
$164.00
www.gemroc.com
Ross-Simons 1.00 ct. t.w. Ruby Floral Earrings in 14kt Yellow Gold
Radiant rubies in a feminine floral pattern are a refreshing burst of happiness on the ear. Glistening, red rubies 1.00 ct. t.w. mingle with sparkling, diamond accents. Post/clutch 14kt yellow gold earrings. Ruby birthstones are the perfect gift for...Only $243.75 at Ross-Simons
no photoRoss-Simons 1.00 ct. t.w. Ruby Floral Earrings in 14kt Yellow Gold
$243.75
Ross-Simons
3.30 carat Genuine Ruby Sterling Silver and Black Ruthenium Heart and Bow Pendant and Cable Chain 18''
Rated by 25,000+ Customers. 3.30 TCW Genuine Ruby Sterling Silver and Black Ruthenium Heart and Bow Pendant and Cable Chain 18''Only $104.49 at PalmBeachJewelry
no photo3.30 carat Genuine Ruby Sterling Silver and Black Ruthenium Heart and Bow Pendant and Cable Chain 18''
$104.49
PalmBeachJewelry
Ross-Simons 6.60 ct. t.w. Ruby Stud Earrings in 14kt Yellow Gold
Make a elegant statement with our radiant 6.60 ct. t.w. ruby stud earrings, suitable for even the daintiest lobes! Clutch/post, 14kt yellow gold earrings. Ruby birthstones are the perfect gift for July birthdays.Only $123.75 at Ross-Simons
no photoRoss-Simons 6.60 ct. t.w. Ruby Stud Earrings in 14kt Yellow Gold
$123.75
Ross-Simons
Ross-Simons .75ct Ruby, .20 C.T. t.w. Diamond Pendant Necklace in Gold. 16"
For ruby lovers, look no further. This fabulous pendant necklace will bring her eternal joy! Gorgeous rich ruby totaling three quarters of a carat is surrounded by sparkling diamonds totaling .20 ct. t.w. 14kt white gold pendant necklace. Ruby...Only $596.25 at Ross-Simons
no photoRoss-Simons .75ct Ruby, .20 C.T. t.w. Diamond Pendant Necklace in Gold. 16"
$596.25
Ross-Simons
ONLINE ONLY - Alexandra Gem Multicolor Gemstone Crisscross Ring, Womens
Chic and unique, this eye-catching ring features a crisscross design with a spattering of soft-hued gemstones. Metal: Rhodium-plated sterling silverStones: Lab-created amethyst, blue spinel, green quartz and red ruby, 9x7mm, 6x4mm, 5x5mm, 5x3mmOther...Only $124.99 at jcpenney
no photoONLINE ONLY - Alexandra Gem Multicolor Gemstone Crisscross Ring, Womens
$124.99
jcpenney
Ross-Simons 3.25 ct. t.w. Ruby Five-Stone Ring in Sterling Silver
Get regal style without paying a royal expense. This five-stone ring showcases overlapping oval rubies totaling 3.25 carats, each framed in rope-textured sterling silver. Majestic! Sterling silver ring. Ruby birthstones are the perfect gift for July...Only $145.00 at Ross-Simons
no photoRoss-Simons 3.25 ct. t.w. Ruby Five-Stone Ring in Sterling Silver
$145.00
Ross-Simons
Sterling Silver Ruby Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $114.74 at JeGem.com
no photoSterling Silver Ruby Ring Jewelry
$114.74
JeGem.com
"14k Gold Ladies 10mm Synthetic Ruby Marquise Cz Center Stone Cocktail Ring"
"14K Gold ladies synthetic Marquise Ruby CZ center stone cocktail ring; measures 12mm wide at its widest point."Only $229.00 at Sarraf Jewelry
no photo"14k Gold Ladies 10mm Synthetic Ruby Marquise Cz Center Stone Cocktail Ring"
$229.00
Sarraf Jewelry
Ross-Simons .60ct t.w. Ruby, .11ct t.w. Diamond Checkerboard Ring in Silver
This .60 ct. t.w. ruby and .11 ct. t.w. diamond checkerboard ring is a great stacked-look style featuring alternating round rubies and diamonds. Sterling silver ring. Ruby birthstones are the perfect gift for July birthdays.Only $135.00 at Ross-Simons
no photoRoss-Simons .60ct t.w. Ruby, .11ct t.w. Diamond Checkerboard Ring in Silver
$135.00
Ross-Simons
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
This Site Awarded
Available RUBY specimens:
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RUB-52
$ 22.50
no photo
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RUB-48
$ 22.50
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see this List of ALL specimens including SOLD ones