Ruby (Sapphire)

  • Hardness

    9.0 on the Mohs scale.

  • Occurrence

    Myanmar (Burma), Thailand, India, Sri Lanka (Ceylon), Tanzania, Afghanistan, Australia, Brazil, Cambodia, Malagasy Republic, Malawi, Pakistan, Zimbabwe (Rhodesia), United States (Montana, North Carolina).

  • Appearance

    Named for it's color (Latin Rubeus). Ruby has been confused with red spinel and garnet. The color can range from "pigeon-blood" to brownish. Other colors are known as sapphire. Inclusions are common, and are used to tell the difference between a synthetic and natural stone. Ruby is the birthstone of the month of July.

  • Enhancements

    Ruby is usually heat treated to improve color and appearance. Surface cavities and fractures are commonly filled with a foreign material, including glass. As a by-product of heat treatment, the presence of solidified borax or similar colorless substances which are visible under 10x magnification are common.

    More information on gemstone enhancements.

  • Gemstone Family

    Ruby is a member of the Sapphire gemstone family.

Ruby Varieties
Ruby Varieties

Indian Star RubyIndian Star Ruby

Ruby
Ruby

RBY122
RBY122
 0.73 ct.
5.0mm Round Cut
Dark
Vivid Strongly Purplish Red
Slightly Included
[E] Routinely enhanced.
One of a kind.
Burma Ruby

RBY218
RBY218
 0.18 ct. total, 'A' Grade
2.5mm Round Cut
Medium Dark
Vivid Strongly Purplish Red
Slightly Included
[H] Heated to improve color.
Quantity Available: 1 pairs
Ruby Corundum

RBY229
RBY229
 0.43 ct., 'AA' Grade
4.9mm Round Cut
Dark
Vivid Strongly Purplish Red
Slightly Included
[N] Not enhanced.
One of a kind.
Set with pendant setting ST18309. Chain not included.
Ruby Corundum

RBY286
RBY286
 0.02 ct., 'B' Grade
1.5mm Round Cut
Very Dark
Strong Strongly Purplish Red
Very Slightly Included
[H] Heated to improve color.
One of a kind.
Ruby Corundum

RBY155
RBY155
 0.22 ct. total, 'A' Grade
4.0x2.0mm Marquise Cut
Medium
Vivid Slightly Purplish Red
Loupe Clean
[E] Routinely enhanced.
Only one pair available.
Ruby

RBY227
RBY227
 0.28 ct., 'AA' Grade
5.0x3.1mm Emerald Cut
Dark
Vivid Strongly Purplish Red
Slightly Included
[H] Heated to improve color.
One of a kind.
Ruby Corundum

RBY285
RBY285
 0.14 ct., 'AA' Grade
3.1mm Cabochon, Round Cut
Dark
Strong Strongly Purplish Red
Slightly Included
[N] Not enhanced.
One of a kind.
Ruby Corundum

Calibrated Ruby
Calibrated Ruby

Specify size, shape and quality when ordering. Prices are subject to change without notice. Actual carat weight may vary from the average carat weight listed.

  • AA Medium dark, clean, pinkish-red, good cut, good polish.
  • A Medium color, clean, pinkish-red, good cut, good polish.
  • B Medium light color, clean, pinkish-red, good cut, good polish.

Ruby Quality AA A B
Shape Size Avg. Weight Price Each
Round CutRound Cut
1mm
0.01 ct.
   
1.25mm
0.01 ct.
1.5mm
0.02 ct.
1.75mm
0.03 ct.
2mm
0.05 ct.
2.25mm
0.07 ct.
  
2.5mm
0.08 ct.
2.75mm
0.12 ct.
3mm
0.16 ct.
  
3.25mm
0.17 ct.
3.5mm
0.20 ct.
  
3.75mm
0.23 ct.
4mm
0.30 ct.
  
4.5mm
0.38 ct.
  
5mm
0.66 ct.
  
5.5mm
0.85 ct.
  
 
  AA A B
Oval CutOval Cut
4x3mm
0.25 ct.
5x3mm
0.32 ct.
5x4mm
0.50 ct.
  
6x4mm
0.60 ct.
7x5mm
1.05 ct.
8x6mm
1.50 ct.
  
 
  AA A B
Pear CutPear Cut
4x3mm
0.20 ct.
5x3mm
0.27 ct.
5x4mm
0.35 ct.
   
6x4mm
0.52 ct.
7x5mm
0.95 ct.
  
 
  AA A B
Marquise CutMarquise Cut
3x1.5mm
0.05 ct.
  
3.5x1.5mm
0.06 ct.
  
3.5x2mm
0.08 ct.
  
3.75x2mm
0.10 ct.
  
4x2mm
0.11 ct.
4.25x2.25mm
0.13 ct.
4.5x2.5mm
0.16 ct.
5x2.5mm
0.19 ct.
5x3mm
0.25 ct.
  
6x3mm
0.33 ct.
7x3.5mm
0.50 ct.
  
8x4mm
0.70 ct.
 
  AA A B
Emerald CutEmerald Cut
5x3mm
0.36 ct.
6x4mm
0.70 ct.
  
 
  AA A B
Square (Step) CutSquare (Step) Cut
1.5mm
0.04 ct.
  
1.75mm
0.05 ct.
  
2mm
0.08 ct.
  
2.25mm
0.10 ct.
  
2.5mm
0.14 ct.
  
2.75mm
0.18 ct.
   
3mm
0.23 ct.
   
4mm
0.45 ct.
  
 
  AA A B
Heart ShapeHeart Shape
3mm
0.14 ct.
   
3.5mm
0.22 ct.
  
4mm
0.36 ct.
  
5mm
0.55 ct.
  
 
  AA A B
Trillion CutTrillion Cut
3mm
0.15 ct.
   
3.5mm
0.23 ct.
  
4mm
0.33 ct.
   
 
  AA A B
Straight Baguette CutStraight Baguette Cut
3x1.5mm
0.07 ct.
  
3x1.75mm
0.10 ct.
  
3x2mm
0.12 ct.
  
3.5x1.5mm
0.08 ct.
   
3.5x2mm
0.13 ct.
   
3.75x2mm
0.16 ct.
   
4x2mm
0.17 ct.
  
5x2mm
0.22 ct.
   
 
  AA A B
Tapered Baguette CutTapered Baguette Cut
3x1.75x1mm
0.07 ct.
   
3x1.75x1.5mm
0.08 ct.
   
3x2x1.5mm
0.09 ct.
   
4x2x1.5mm
0.13 ct.
   
 
  AA A B
Princess CutPrincess Cut
1.5mm
0.03 ct.
  
1.75mm
0.05 ct.
  
2mm
0.07 ct.
  
2.25mm
0.09 ct.
  
2.5mm
0.13 ct.
  
2.75mm
0.16 ct.
  
3mm
0.20 ct.
  
3.25mm
0.25 ct.
   
3.5mm
0.29 ct.
  
4mm
0.40 ct.
   
 
  AA A B
Cabochon, Round CutCabochon, Round Cut
2.5mm
0.12 ct.
   
3mm
0.18 ct.
  
4mm
0.40 ct.
   

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