RUBY
the red variety of corundum

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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
Sterling Silver Earrings with Ruby - Star Flower Earrings
These five petal star-shaped flower earrings add the perfect feminine note to casual or tailored outfits.Only $185.00 at Gemvara
no photoSterling Silver Earrings with Ruby - Star Flower Earrings
$185.00
Gemvara
1.90 ct. t.w. Ruby Earrings With Diamond Accents in Sterling Silver
Ravishing ruby ovals of 1.90 ct. t.w. stand out on these earrings among bursts of diamond accents. For ultimate glow, pair with a ruby and diamond ring or pendant. Post/clutch, sterling silver earrings. Ruby birthstones are the perfect gift for July...Only $296.25 at Ross-Simons
no photo1.90 ct. t.w. Ruby Earrings With Diamond Accents in Sterling Silver
$296.25
Ross-Simons
0.36 ctw Silver Round Ruby Seven Stone Fashion Stackables Wedding Band
Brilliant and bewitching, this seven-stone ring is a perfect choice for an engagement ring or wedding band. Designed in precious silver, gold or platinum, this romantic piece highlights fiery red rubies and twinkling diamonds. With options for stone...Only $529.00 at Angara.com
no photo0.36 ctw Silver Round Ruby Seven Stone Fashion Stackables Wedding Band
$529.00
Angara.com
The Wings of Love Ruby Ring
Ruby and diamond baskets designed to enhance brilliance by allowing maximum light to shine through. Classic 2:1 diameter ratio between center Ruby and two side diamonds creates ideal symmetry. Diamonds cover the entire width of the finger, creating an...Only $689.00 at Angara.com
no photoThe Wings of Love Ruby Ring
$689.00
Angara.com
5.00 ct. t.w. Ruby Heart Pendant in Sterling Silver
Ruby red is the color of love and this 5.00 ct. t.w. pave ruby heart pendant has a bold asymmetrical silhouette that we just love. Single bale accommodates a 3mm chain, which is sold separately. Sterling silver pendant. Ruby birthstones are the perfect...Only $195.00 at Ross-Simons
no photo5.00 ct. t.w. Ruby Heart Pendant in Sterling Silver
$195.00
Ross-Simons
1.10ct t.w. Ruby, .25ct t.w. Diamond Chevron Necklace. 17"
Oh-so divine! 1.10 ct. t.w. marquise rubies and .25 ct. t.w. round brilliant-cut diamonds form an alluring chevron shape on a fancy chain necklace. Lobster clasp, 14kt yellow gold necklace. Ruby birthstones are the perfect gift for July birthdays.Only $995.00 at Ross-Simons
no photo1.10ct t.w. Ruby, .25ct t.w. Diamond Chevron Necklace. 17"
$995.00
Ross-Simons
Lab Created Ruby Ring
An exceptional design, this solitaire engagement ring is perfect for a woman who loves to mix the classic with contemporary. Beautifully crafted in 10k white gold, the eyes are drawn to the fiery red lab created ruby, which is finely studded in four...Only $539.00 at Angara.com
no photoLab Created Ruby Ring
$539.00
Angara.com
1.5 ctw 14K White Gold Round Ruby Eternity Wedding Band Width (3.8 mm)
Honor your relationship as you slip this fine eternity wedding band on her finger. Carefully matched round stones are delicately perched on a precious metal band, making this a desirable choice to exchange your wedding vows. This could also be a...Only $629.00 at Angara.com
no photo1.5 ctw 14K White Gold Round Ruby Eternity Wedding Band Width (3.8 mm)
$629.00
Angara.com
The Embrace Ruby Ring
Design highlights the center stone while the side stones are accents that add sparkle. Split shank mounting angles create a geometric mix of white space and metal. Classic three stone design with a contemporary twist.Only $489.00 at Angara.com
no photoThe Embrace Ruby Ring
$489.00
Angara.com
Round Black Onyx Sterling Silver Necklace with Ruby - Heart's Hug Pendant
These hearts hold a smaller one, studded with gems, celebrating love of all kinds.Only $185.00 at Gemvara
no photoRound Black Onyx Sterling Silver Necklace with Ruby - Heart's Hug Pendant
$185.00
Gemvara
0.2 ctw 14K White Gold Round Ruby Seven Stone Fashion Stackables Wedding Band
Brilliant and bewitching, this seven-stone ring is a perfect choice for an engagement ring or wedding band. Designed in precious silver, gold or platinum, this romantic piece highlights fiery red rubies and twinkling diamonds. With options for stone...Only $499.00 at Angara.com
no photo0.2 ctw 14K White Gold Round Ruby Seven Stone Fashion Stackables Wedding Band
$499.00
Angara.com
0.35 ctw 14K White Gold Round Ruby and Diamond Half Eternity Wedding Band
Classic and forever, this channel set fine gemstone and diamond band is a lovely choice to exchange your wedding vows. This timeless band fashioned in precious metal will surely express your love to her in a very promising way.Only $939.00 at Angara.com
no photo0.35 ctw 14K White Gold Round Ruby and Diamond Half Eternity Wedding Band
$939.00
Angara.com
Heart Ruby and Diamond Dangling Pendant
Heart Ruby and Diamond Dangling PendantOnly $209.00 at Angara.com
no photoHeart Ruby and Diamond Dangling Pendant
$209.00
Angara.com
1.08 ctw 14K White Gold Round Ruby Eternity Wedding Band Width (3 mm)
Honor your relationship as you slip this fine eternity wedding band on her finger. Carefully matched round stones are delicately perched on a precious metal band, making this a desirable choice to exchange your wedding vows. This could also be a...Only $599.00 at Angara.com
no photo1.08 ctw 14K White Gold Round Ruby Eternity Wedding Band Width (3 mm)
$599.00
Angara.com
Sterling Silver Necklace with Ruby - Love Letters 'Y' Pendant With Gem
You choose the lowercase letter below and the meaning behind it. Artisans handcraft the precious metal of your choice in a single flowing line, and accent the design with your favorite gem. The chain threads directly through the letter.Only $160.00 at Gemvara
no photoSterling Silver Necklace with Ruby - Love Letters 'Y' Pendant With Gem
$160.00
Gemvara

This Site Awarded
Available RUBY specimens:
RUBY specimen RUB-52
$ 45.00 -50% = $ 22.50
Dims: 1.89x1.55x1.49in (4.80x3.94x3.77cm) .... Wt: 5.1oz (144g) .... Loc: Madagascar
The cross-section of this sapphire crystal shows good hexagonal form and most of one natural termination. Part of the specimen is a mass of brown to black muscovite plus minor amounts of albite.
no photo
RUB-52
$ 22.50
no photo
RUBY specimen RUB-48
$ 25.00 -20% = $ 20.00
Dims: 0.88x0.84x0.64in (2.22x2.14x1.62cm) .... Wt: 0.40oz (11.3g) .... Loc: Rai-Iz, Polar Ural, Russia
This small specimen contains four ruby crystals, but only one is significantly exposed - the others show a single face. Still, it is a nice ruby crystal, with excellent color and a pleasing appearance when examined using a loupe.
no photo
RUB-48
$ 20.00
no photo
see this List of ALL specimens including SOLD ones
 

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