• Hardness

  10.0.

• Occurrence

  Worldwide, most notable locations are Australia, Africa, Brazil, Russia, India and most recently, Northern Canada. Diamond is the birthstone for the month of April.

• Appearance

  The normal range of colors in diamonds run from colorless to slightly yellow or brown. "Fancy colors" are those colors outside the normal range, and are found in all colors. The most sought after are colorless, and the more intense "fancy colors", blue, pink and red. Red diamonds are among the rarest of all gemstones, only two are known to exist.

• Enhancements

  Diamond is occasionally to commonly laser drilled to improve appearance. Surface cavities or fractures are occasionally filled with a hardened surface. Colored diamonds are occasionally irradiated and/or heat treated to induce "fancy" colors.

  More information on gemstone enhancements.

• Grading

  Diamonds are graded by carat weight, color, clarity and cut. These are known as the "four C's".

  • Carat weight
  • Color
    Color is usually graded using the GIA grading scale, which ranges from "D" to "Z". "D" color diamonds are colorless, and "Y" is the darkest yellow. "Z" indicates a fancy color.
  • Clarity
    Clarity is also graded using a GIA scale.
    • F, FL : Flawless
    • IF : Internally Flawless
    • VVS1, VVS2 : Very very slightly included, inclusions are very hard to see under magnification.
    • VS1, VS2 : Very slightly included, inclusions are hard to see under magnification.
    • SI1, SI2 : Slightly included, inclusions are easy to see under magnification, may be visible without magnification.
    • I1, I2, I3 : Imperfect, inclusions are visible to the naked eye.
  • Cut
    Grading Cut is not as standardize as the other C's, but is grading according to overall finish, proportions, brilliance and general appearance of the diamond.

• Some Famous Diamonds

  • The Hope Diamond in the Smithsonian Gem & Mineral Collection.
  • Smithsonian Canary Diamond in the Smithsonian Gem & Mineral Collection.
  • The Portuguese Diamond (127.01 carats) in the Smithsonian Gem & Mineral Collection.
  • Victoria-Transvaal Diamond in the Smithsonian Gem & Mineral Collection.
  • Napolean I Diamond Necklace in the Smithsonian Gem & Mineral Collection.
  • Marie Antionette Earrings in the Smithsonian Gem & Mineral Collection.

• Black Diamond

• Diamond

• Calibrated Diamond

  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.

  • VS Very slightly included, G-I color, good cut, good polish (industry VVS).
  • SI Slightly included, G-I color, good cut, good polish (industry VS).

  Diamond		Quality	VS	SI
  Shape	Size	Avg. Weight	Price Each
  Round Brilliant	1mm	0.01	$ 6	$ 5
  	1.2mm	0.01	$ 9	$ 8
  	1.3mm	0.01	$ 11	$ 10
  	1.5mm	0.01	$ 17	$ 15
  	1.7mm	0.02	$ 22	$ 20
  	1.8mm	0.03	$ 28	$ 25
  	2mm	0.03	$ 33	$ 30
  	2.2mm	0.04	$ 44	$ 39
  	2.4mm	0.05	$ 56	$ 49
  	2.5mm	0.06	$ 67	$ 59
  	2.7mm	0.07	$ 78	$ 82
  	2.8mm	0.08	$ 108	$ 94
  	3mm	0.11	$ 135	$ 141
  	3.2mm	0.13	$ 161	$ 166
  	3.4mm	0.17	$ 278	$ 253
  	3.8mm	0.20	$ 371	$ 332
  	4.1mm	0.25	$ 532	$ 528
  	4.4mm	0.33	$ 842	$ 790
  Oval	4x3mm	0.17		$ 304
  	5x3mm	0.25	$ 595	$ 532
  	5x4mm	0.33	$ 982	$ 842
  	6x4mm	0.37		$ 1,054
  Pear	3x2.5mm	0.09		$ 152
  	4x2.5mm	0.11	$ 206	$ 185
  	4x3mm	0.14	$ 265	$ 236
  	4.5x3mm	0.15	$ 306	$ 270
  	5x3mm	0.20	$ 459	$ 400
  	5.5x3.5mm	0.25		$ 549
  	6x4mm	0.33	$ 954	$ 884
  Marquise	2x1.25mm	0.01		$ 12
  	2.5x1.25mm	0.02		$ 24
  	2.5x1.75mm	0.04		$ 47
  	3x1.5mm	0.04		$ 47
  	3.5x1.75mm	0.05	$ 75	$ 64
  	3.5x2mm	0.06		$ 81
  	4x2mm	0.08	$ 118	$ 112
  	4.25x2.25mm	0.09	$ 152	$ 126
  	4.5x2.5mm	0.13	$ 197	$ 183
  	5x2.5mm	0.15	$ 262	$ 223
  	5x3mm	0.20		$ 323
  	6x3mm	0.25		$ 489
  	6x3.5mm	0.33		$ 780
  Emerald	3.7x2.7mm	0.20	$ 357	$ 303
  	4x3mm	0.25	$ 521	$ 421
  	4.5x3mm	0.33	$ 724	$ 589
  Square	1.25mm	0.01		$ 14
  	1.5mm	0.02		$ 18
  	1.75mm	0.03		$ 30
  	2mm	0.05		$ 58
  	2.5mm	0.09		$ 119
  Heart	3mm	0.12	$ 235	$ 202
  	3.5mm	0.20	$ 425	$ 371
  	4mm	0.25	$ 591	$ 532
  	4.5mm	0.33	$ 948	$ 836
  Straight Baguette	3x1.5mm	0.03	$ 268	$ 91
  	3x2mm	0.09	$ 402	$ 271
  	3.5x1.5mm	0.07	$ 322	$ 247
  	3.5x2mm	0.12	$ 551	$ 282
  	3.75x2mm	0.13	$ 597	$ 387
  	4x2mm	0.09	$ 730	$ 363
  	4x3mm	0.23	$ 1,653	$ 927
  	4.25x2.25mm	0.15	$ 964	$ 605
  	5x2mm	0.19	$ 1,381
  	5x2.5mm	0.25	$ 1,913
  Tapered Baguette	2.75x1.75x1.5mm	0.05	$ 202	$ 125
  	3x1.75x1mm	0.06	$ 279	$ 181
  	3x2x1.5mm	0.07	$ 325	$ 211
  	3x2x1.75mm	0.08	$ 372
  	3.5x1.5x1mm	0.05	$ 232	$ 129
  	3.5x1.75x1mm	0.07	$ 325	$ 161
  	3.5x2x1.5mm	0.09	$ 418	$ 257
  	3.75x2x1.5mm	0.09	$ 480	$ 289
  	4x2x1.5mm	0.10	$ 505	$ 323
  Trielle®	3mm	0.07	$ 153	$ 132
  	3.5mm	0.13	$ 271	$ 242
  	4mm	0.19	$ 461	$ 328
  	4.5mm	0.22	$ 676	$ 543
  	5mm	0.29	$ 1,004	$ 804
  	5.5mm	0.40	$ 1,464	$ 1,207
  	6mm	0.45	$ 2,618	$ 1,836
  Princess	1.25mm	0.01	$ 19	$ 8
  	1.5mm	0.03	$ 28	$ 23
  	1.75mm	0.04	$ 40	$ 37
  	2mm	0.05	$ 64	$ 46
  	2.25mm	0.08	$ 85	$ 65
  	2.5mm	0.11	$ 141	$ 102
  	2.75mm	0.13	$ 179	$ 144
  	3mm	0.18	$ 253	$ 214
  	3.25mm	0.24	$ 333	$ 302
  	3.5mm	0.26	$ 500	$ 365
  	3.75mm	0.31	$ 668	$ 501
  	4mm	0.37	$ 945	$ 676

  Trielle® Brand Trillion Cut Diamonds, Cut exclusively in the U.S.A.

• GIA Credentials

  Andre' Hut, one of the owners of Gem Hut is also a holder of a GIA Diamonds Certificate, and is currently working towards the Graduate Gemologist certificate.

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Last updated February 9, 2010
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