• Hardness

  9.0.

• 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.

• Indian Star Ruby

• Ruby

  • Item #RBY122
    	0.73 ct.
    	5.0mm Round Cut
    	Dark
    	Vivid Strongly Purplish Red
    	Slightly Included
    	[E] Routinely enhanced.
    	one of a kind
    Burma Ruby	$ 744.99

  • Item #RBY227
    	0.28 ct.
    	5.0x3.1mm Emerald Cut
    	Dark
    	Vivid Strongly Purplish Red
    	Slightly Included
    	[H] Heated to improve color.
    	one of a kind
    Ruby Corundum	$ 356.00

  • Item #RBY191
    	0.90 ct. total
    	4.6mm Trillion Cut
    	Medium
    	Vivid Purple-Red
    	Slightly Included
    	[E] Routinely enhanced.
    	only one pair available
    Ruby Ruby	$ 1,334.99/pair

• 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.

  Ruby		Quality	AAA	AA	A	B
  Shape	Size	Avg. Weight	Price Each
  Round	1mm	0.01			$ 8
  	1.25mm	0.01			$ 8
  	1.5mm	0.03		$ 6	$ 8
  	1.75mm	0.04		$ 6	$ 12
  	2mm	0.05		$ 9	$ 14
  	2.25mm	0.07		$ 12	$ 19
  	2.5mm	0.09		$ 16	$ 27
  	2.75mm	0.11		$ 18	$ 33
  	3mm	0.16		$ 43	$ 75
  	3.25mm	0.19		$ 60	$ 89
  	3.5mm	0.27		$ 97	$ 160
  	3.75mm	0.30		$ 158	$ 220
  	4mm	0.36		$ 268	$ 348
  	4.5mm	0.51		$ 515	$ 534
  	5mm	0.63		$ 838	$ 1,257
  	5.5mm	0.78		$ 1,186	$ 1,882
  	6mm	1.14			$ 3,724
  	6.5mm	1.34			$ 4,735
  Round Brilliant	1.25mm	0.01			$ 6
  	1.5mm	0.02		$ 14	$ 10
  	1.75mm	0.03		$ 18	$ 15
  	2mm	0.04		$ 26	$ 18
  	2.25mm	0.04		$ 31	$ 22
  	2.5mm	0.08		$ 45	$ 32
  	2.75mm	0.11		$ 62	$ 44
  	3mm	0.13		$ 73	$ 52
  	3.25mm	0.16		$ 84	$ 64
  	3.5mm	0.20		$ 206	$ 120
  	3.75mm	0.22		$ 216	$ 126
  	4mm	0.24			$ 256
  	4.5mm	0.43			$ 631
  Oval	4x3mm	0.26		$ 286	$ 187
  	5x3mm	0.27		$ 374	$ 242	$ 65
  	5x4mm	0.46		$ 621	$ 399
  	5.5x4mm	0.51		$ 1,068	$ 612
  	6x4mm	0.66		$ 1,439	$ 756	$ 189
  	6.5x4.5mm	0.79		$ 2,054	$ 1,314
  	7x5mm	1.05		$ 5,801	$ 2,800
  Pear	4x3mm	0.21		$ 231	$ 154
  	5x3mm	0.26		$ 331	$ 191
  	5x4mm	0.44		$ 492	$ 411
  	6x4mm	0.54		$ 1,134	$ 648	$ 179
  	7x5mm	0.91		$ 4,680	$ 2,427
  Marquise	3x1.5mm	0.05		$ 20	$ 20
  	3x1.75mm	0.06		$ 30	$ 24
  	3.5x1.5mm	0.06			$ 24
  	3.5x1.75mm	0.07			$ 28
  	3.5x2mm	0.07		$ 35	$ 36
  	3.75x1.75mm	0.07			$ 28
  	3.75x2mm	0.10		$ 45	$ 40
  	4x2mm	0.12		$ 72	$ 48
  	4.25x2.25mm	0.13		$ 78	$ 52
  	4.5x2.5mm	0.15		$ 102	$ 60
  	5x2.5mm	0.20		$ 160	$ 120
  	5x3mm	0.25		$ 245	$ 150
  	6x3mm	0.31		$ 464	$ 228
  	6.5x3.5mm	0.42		$ 756	$ 368
  	7x3.5mm	0.59		$ 1,298	$ 567
  	8x4mm	0.70		$ 2,007	$ 1,278
  Emerald	5x3mm	0.35		$ 700	$ 320
  	5.5x4mm	0.59		$ 1,456
  	6x4mm	0.61		$ 2,556	$ 1,220
  Square	1.25mm	0.02		$ 11	$ 8
  	1.5mm	0.04		$ 17	$ 16
  	1.7mm	0.05		$ 28
  	1.75mm	0.05			$ 20
  	2mm	0.07			$ 28
  	2.25mm	0.10			$ 40
  	2.5mm	0.14			$ 79
  	2.75mm	0.18			$ 101
  	3mm	0.23			$ 184
  	3.5mm	0.28			$ 224
  Heart	3mm	0.14			$ 112
  	3.5mm	0.21			$ 210
  	4mm	0.36		$ 328	$ 537
  	4.5mm	0.47		$ 960	$ 690
  	5mm	0.59			$ 1,180
  Trillion	3mm	0.15			$ 110
  	3.5mm	0.23			$ 230
  	4mm	0.32		$ 491	$ 396
  	4.5mm	0.40		$ 640	$ 614
  	5mm	0.55		$ 1,387	$ 1,100
  	5.5mm	0.74			$ 1,727
  Straight Baguette	3x1.5mm	0.07			$ 34
  	3x2mm	0.11			$ 53
  	4x2mm	0.17			$ 94
  	5x2.5mm	0.33			$ 192
  Tapered Baguette	3x2x1.5mm	0.09			$ 47
  	3.5x2x1.5mm	0.10			$ 55
  	4x2x1.5mm	0.13			$ 76
  Princess	1.5mm	0.03			$ 11
  	1.7mm	0.05		$ 24
  	1.75mm	0.04	$ 18		$ 15
  	2mm	0.06		$ 12	$ 29
  	2.2mm	0.08		$ 39
  	2.25mm	0.09			$ 33
  	2.5mm	0.12		$ 58	$ 47
  	2.7mm	0.17		$ 82
  	2.75mm	0.15			$ 54
  	3mm	0.20		$ 136	$ 95
  	3.5mm	0.29			$ 189
  Cabochon, Round	3mm	0.18			$ 42
  	3.5mm	0.24			$ 65
  Cabochon, Oval	5x3mm	0.37			$ 96
  	6x4mm	0.61			$ 195

• Ruby (Corundum) Alternatives

  • Spinel
  • Garnet

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Last updated May 18, 2010
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