• Hardness

  7.0.

• Occurrence

  Worldwide.

• Appearance

  Violet, lilac or mauve quartz is called amethyst. Amethyst is sometimes heat treated to form citrine. Amethyst crystals can form together with citrine crystals to form bi-colored quartz called ametrine. Amethyst is the birthstone of the month of February.

• Enhancements

  Occasionally heated to lighten color and/or to remove "smoky" components.

  More information on gemstone enhancements.

• Quartz Gemstone Family

  •  Quartz
  •  Chalcedony
  •  Hawk's Eye
  •  Ametrine
  •  Rose De France Amethyst
  •  Amethyst
  •  Citrine
  •  Prasiolite
  •  Green Quartz
  •  Bi-Color Quartz
  •  Cat's Eye Quartz
  •  Drusy Quartz
  •  Gold Included Quartz
  •  Grey Quartz
  •  Lepidachrosite
  •  Petersite
  •  Rose Quartz
  •  Rutilated Quartz
  •  Star Quartz
  •  Smoky Quartz
  •  Tiger's Eye
  •  Tourmalinated Quartz
  •  Peach Aventurine
  •  Aventurine

• Item #QAT118
  	0.42 ct. total
  	4.0mm Round Cut
  	Medium Light
  	Vivid Bluish Purple
  	Slightly Included
  	[E] Routinely enhanced.
  	Quantity Available: 6 pairs
  fair cutting
  Amethyst Quartz	$ 4.99/pair

• Item #QAT242
  	0.71 ct.
  	7.0x5.0mm Oval Cut
  	Medium Dark
  	Vivid Bluish Purple
  	Loupe Clean
  	[E] Routinely enhanced.
  	one of a kind
  Amethyst Quartz	$ 19.99/pair

• Item #QAT296
  	0.14 ct. total
  	4.0x2.0mm Marquise Cut
  	Light
  	Strong Bluish Purple
  	Loupe Clean
  	[N] Not enhanced.
  	Quantity Available: 5 pairs
  Amethyst Quartz	$ 20.99/pair

• Item #QAT203
  	4.97 ct.
  	11.9x9.7mm Emerald Cut
  	Medium
  	Vivid Bluish Purple
  	Very Slightly Included
  	[E] Routinely enhanced.
  	one of a kind
  Slight color zoning.
  Amethyst Quartz	$ 129.99

• Item #QAT320
  	0.61 ct.
  	4.9mm Square (Step) Cut
  	Medium
  	Strong Bluish Purple
  	Loupe Clean
  	[E] Routinely enhanced.
  	one of a kind
  Amethyst Quartz	$ 24.99

• Item #QAT214
  	0.81 ct. total
  	5.0mm Heart Shape
  	Medium
  	Vivid Bluish Purple
  	Very Very Slightly Included
  	[N] Not enhanced.
  	Quantity Available: 2 pairs
  Amethyst Quartz	$ 29.99/pair

• Item #QAT305
  	7.03 ct.
  	12.0mm Hexagon Cut
  	Medium Dark
  	Vivid Violet
  	Loupe Clean
  	[E] Routinely enhanced.
  	one of a kind
  Amethyst Quartz	$ 289.99

• Item #QAT319
  	1.65 ct.
  	8.0mm Trillion, Checkerboard Top Cut
  	Medium
  	Strong Bluish Purple
  	Very Very Slightly Included
  	[E] Routinely enhanced.
  	one of a kind
  Amethyst Quartz	$ 35.99

Calibrated Gemstones
Calibrated Gemstones by Shape

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.

• AAA Dark, clean, little or no color zoning, good cut.
• AA Medium dark, clean, little or no color zoning, good cut.
• A Medium light, clean, little or no color zoning, good cut.
• B Light purple, eye clean to slightly included, little or no color zoning, good cut.

Amethyst		Quality	AAA	AA	A	B
Shape	Size	Avg. Weight	Price Each
Round	1.5mm	0.018		$ 8	$ 6
	1.75mm	0.023		$ 8	$ 6
	2mm	0.035		$ 8	$ 6	$ 4
	2.25mm	0.045		$ 8	$ 6	$ 4
	2.5mm	0.06		$ 8	$ 6	$ 4
	2.75mm	0.08		$ 8	$ 6
	3mm	0.10	$ 9	$ 8	$ 6	$ 4
	3.25mm	0.12		$ 8	$ 6	$ 4
	3.5mm	0.15	$ 9	$ 8	$ 6	$ 4
	3.75mm	0.20		$ 11	$ 8	$ 5
	4mm	0.24	$ 12	$ 11	$ 8	$ 5
	4.25mm	0.28			$ 9	$ 6
	4.5mm	0.32	$ 13	$ 12	$ 9	$ 6
	5mm	0.48	$ 21	$ 16	$ 9	$ 7
	5.5mm	0.60	$ 25	$ 21	$ 11	$ 9
	6mm	0.74	$ 32	$ 24	$ 13	$ 12
	6.5mm	1.00	$ 44	$ 36	$ 19	$ 15
	7mm	1.20	$ 59	$ 47	$ 25	$ 18
	8mm	1.75	$ 90	$ 70	$ 38
	9mm	2.56	$ 132	$ 106	$ 57
	9.5mm	2.88		$ 122
	10mm	3.46	$ 177	$ 142	$ 82
Oval	4x3mm	0.20			$ 6
	5x3mm	0.22	$ 12	$ 11	$ 8	$ 6
	6x4mm	0.44	$ 19	$ 16	$ 8	$ 7
	7x5mm	0.72	$ 28	$ 24	$ 12	$ 11
	8x6mm	1.20	$ 49	$ 39	$ 22
	9x7mm	1.70	$ 74	$ 61	$ 35
	10x8mm	2.45	$ 110	$ 93	$ 52	$ 44
	11x9mm	3.25	$ 132	$ 112	$ 70
	12x10mm	4.40	$ 198	$ 170	$ 99
	14x10mm	5.75	$ 285	$ 258	$ 128	$ 128
	14x12mm	7.00	$ 425	$ 379	$ 161
	16x12mm	8.75	$ 618	$ 512	$ 237
	18x13mm	11.15	$ 778	$ 648
Pear	5x3mm	0.22	$ 12	$ 11	$ 7	$ 6
	6x4mm	0.37	$ 17	$ 13	$ 8	$ 6
	7x5mm	0.63	$ 25	$ 22	$ 12
	8x5mm	0.79	$ 34	$ 27	$ 16	$ 16
	8x6mm	0.95	$ 40	$ 32	$ 19
	9x6mm	1.15	$ 52	$ 38	$ 24
	10x7mm	1.70	$ 79	$ 62	$ 39	$ 31
	10x8mm	2.26	$ 102	$ 86	$ 50
	12x8mm	2.70	$ 124	$ 105	$ 65
	13x9mm	3.35	$ 162	$ 131
	14x9mm	4.15	$ 204	$ 173	$ 110
	14x10mm	4.85	$ 266	$ 205	$ 129
	15x10mm	5.20	$ 290	$ 258	$ 152
	16x12mm	7.50		$ 433	$ 200
Marquise	4x2mm	0.075	$ 12	$ 11	$ 8	$ 6
	5x2.5mm	0.15	$ 13	$ 11	$ 8	$ 6
	5x3mm	0.17	$ 13	$ 12	$ 8
	6x3mm	0.22	$ 14	$ 12	$ 8	$ 6
	7x3.5mm	0.35	$ 19	$ 14	$ 9	$ 6
	8x4mm	0.55	$ 29	$ 22	$ 12
	9x4.5mm	0.75		$ 30	$ 16
	10x5mm	0.90	$ 44	$ 35	$ 19
	12x6mm	1.60	$ 77	$ 61	$ 33
	14x7mm	2.35	$ 123	$ 99	$ 53
	15x7mm	2.85	$ 153	$ 121	$ 69
Emerald	5x3mm	0.28		$ 13	$ 10
	6x4mm	0.55	$ 30	$ 22	$ 12	$ 10
	7x5mm	0.90	$ 42	$ 35	$ 17	$ 14
	8x6mm	1.50	$ 70	$ 54	$ 27
	9x7mm	2.25	$ 98	$ 80	$ 43
	10x8mm	3.15	$ 171	$ 144	$ 56	$ 54
	11x9mm	4.15	$ 253	$ 206	$ 80	$ 75
	12x10mm	5.90	$ 428	$ 338	$ 113	$ 110
	14x10mm	7.35	$ 558	$ 450	$ 158
	16x12mm	10.65		$ 652	$ 298
Square (Step)	3mm	0.15		$ 13	$ 8	$ 6
	3.5mm	0.24		$ 13	$ 9	$ 7
	3.75mm	0.26		$ 15	$ 9
	4mm	0.32	$ 18	$ 15	$ 10	$ 7
	5mm	0.60	$ 34	$ 27	$ 13	$ 10
	6mm	1.08	$ 61	$ 47	$ 20
	6.5mm	1.30			$ 26
	7mm	1.65	$ 112	$ 69	$ 34
	8mm	2.40		$ 121	$ 54
	9mm	3.50			$ 83	$ 76
Heart	4mm	0.22	$ 12	$ 11	$ 8
	5mm	0.42	$ 21	$ 17	$ 9	$ 6
	6mm	0.68	$ 32	$ 27	$ 13
	7mm	1.15	$ 57	$ 45	$ 22
	8mm	1.65	$ 85	$ 73	$ 36
	9mm	2.50	$ 130	$ 104	$ 56
	10mm	3.30	$ 170	$ 137	$ 79
	11mm	4.20	$ 328
	12mm	5.63		$ 308
	13mm	6.69	$ 490
Trillion	3mm	0.10			$ 8	$ 7
	3.5mm	0.14		$ 15	$ 9	$ 7
	4mm	0.22	$ 18	$ 15	$ 9	$ 7
	4.5mm	0.28		$ 16	$ 9	$ 8
	5mm	0.42	$ 21	$ 17	$ 9	$ 8
	5.5mm	0.50		$ 23
	6mm	0.67	$ 35	$ 28	$ 13	$ 12
	6.5mm	0.86		$ 39
	7mm	1.00	$ 58	$ 46	$ 19
	8mm	1.65	$ 97	$ 75	$ 34
	9mm	1.93	$ 121	$ 98	$ 44
	10mm	2.65	$ 164	$ 132	$ 65
	11mm	3.80	$ 240
	12mm	4.70		$ 258	$ 130	$ 113
	13mm	6.53	$ 412
Straight Baguette	4x2mm	0.12		$ 13	$ 9
	5x2mm	0.15		$ 13	$ 10
	5x3mm	0.30		$ 13	$ 11
	8x4mm	0.80		$ 38	$ 21
Princess	2mm	0.05		$ 11	$ 6	$ 4
	2.5mm	0.08		$ 13	$ 7	$ 5
	3mm	0.14		$ 14	$ 8	$ 6
	3.5mm	0.22		$ 16	$ 11
	4mm	0.33		$ 17	$ 11
	4.5mm	0.47		$ 21	$ 12
	5mm	0.65		$ 29	$ 15
	5.5mm	0.82		$ 37	$ 18
	6mm	1.00		$ 46	$ 22
	6.5mm	1.25		$ 59	$ 30
	8mm	2.30		$ 140	$ 57
Cabochon, Round	3mm	0.16		$ 9
	3.5mm	0.22		$ 10
	4mm	0.35		$ 10
	4.5mm	0.55		$ 12
	5mm	0.60		$ 16
	5.5mm	0.84		$ 21
	6mm	1.10		$ 28
	7mm	1.50		$ 44
	8mm	2.36		$ 80
	10mm	3.79		$ 175
	12mm	7.59		$ 191
Cabochon, Oval	5x3mm	0.30		$ 11
	6x4mm	0.55		$ 18
	7x5mm	1.00		$ 31
	8x6mm	1.55		$ 41
	9x7mm	3.00		$ 88
	10x8mm	3.45		$ 105
	11x9mm	4.00		$ 120
	12x10mm	5.70		$ 173
	14x10mm	7.00		$ 238	$ 151
	16x12mm	11.00		$ 300	$ 205
Cabochon, Pear	5x3mm	0.25		$ 11
	6x4mm	0.50		$ 17
	7x5mm	0.85		$ 27
	8x5mm	1.00		$ 29
	8x6mm	1.45		$ 41
	9x6mm	1.75		$ 48
	10x7mm	2.40		$ 70
Cabochon, Square	3mm	0.22		$ 7
	4mm	0.45		$ 12
	5mm	0.81		$ 20
	6mm	1.45		$ 42
	7mm	2.00		$ 62
	8mm	3.00		$ 106
	10mm	5.85			$ 131
	12mm	10.00			$ 188
	14mm	18.00			$ 304
Cabochon, Heart	7mm	1.50		$ 39
	8mm	2.30		$ 60
Cabochon, Trillion	6mm	0.90		$ 35	$ 25
Antique	5mm	0.50		$ 20	$ 12
	6mm	0.85		$ 36	$ 17
	8mm	2.00		$ 90
Antique Cushion	8x6mm	1.22		$ 48	$ 26
	9x7mm	1.88		$ 79	$ 43
	10x8mm	2.60		$ 102	$ 64
	11x9mm	3.70		$ 145	$ 89
	12x10mm	4.75		$ 216	$ 105
	14x10mm	6.20	$ 357	$ 326	$ 133
Hexagon	8mm	2.00		$ 97	$ 50
	9mm	2.90		$ 142	$ 71
	10mm	3.95		$ 192	$ 107
	12mm	7.00	$ 462	$ 386	$ 178
Briolette	6x4mm	0.60		$ 14
	8x5mm	1.15		$ 28
	10x5mm	1.50		$ 32
Fancy, Kite	20x14mm	6.90		$ 276
Lozenge	12x8mm	2.10		$ 96
Octagon	8mm	1.95			$ 30
Oval, Checkerboard Top	5.5x4mm	0.35			$ 10
	6x4mm	0.42		$ 17	$ 11
	7x5mm	0.65		$ 17
	8x6mm	1.20		$ 47	$ 27
	9x7mm	1.70		$ 68	$ 40	$ 37
	10x8mm	2.20		$ 109
	12x10mm	4.00		$ 195
Roll Top	10x8mm	2.95			$ 107
Round, Checkerboard Top	7mm	1.20		$ 54	$ 32
	8mm	1.75		$ 89	$ 52
Trillion, Checkerboard Top	8mm	1.50			$ 38
Antique, Checkerboard Top	5mm	0.50		$ 21	$ 12
	6mm	0.85		$ 38	$ 17
	7mm	1.45		$ 68	$ 32
	8mm	2.00		$ 97	$ 45
	9mm	2.80		$ 140	$ 68
	10mm	3.65		$ 180	$ 104
	12mm	7.00		$ 336	$ 204
Antique Cushion, Checkerboard Top	8x6mm	1.26		$ 53	$ 30
	9x7mm	1.85		$ 84	$ 47
	10x8mm	2.50		$ 102	$ 65

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Last updated April 2, 2012
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