Calibrated Amethyst Gemstones
Shop natural calibrated amethyst in precise sizes ideal for standard jewelry settings.
|
Bi-color
|
Black
|
Blue
|
Brown
|
Golden
|
Gray
|
Green
|
Multicolor
|
Orange
|
Pink
|
Purple
|
Red
|
Turquoise
|
Violet Calibrated Amethyst
|
White Calibrated Amethyst
|
Yellow
|
Single |
Pairs |
Lots |
Faceted |
Cabochons |
18.92ct Violet Amethyst, Cushion, VVS
20 x 15 mm (calibrated)
$ 131.91
3.04ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.78
2.71ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 18.89
2.44ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 13.36
5.36ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 29.37
2.23ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 12.22
16.80ct Violet Amethyst, Oval, IF
20 x 15 mm (calibrated)
$ 111.55
2.60ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 17.09
3.13ct Violet Amethyst, Pear Shape, VS
13 x 9 mm (calibrated)
$ 24.00
1.80ct Violet Amethyst, Pear Shape, VVS-VS
10 x 7 mm (calibrated)
$ 11.84
4.01ctw Violet Amethyst, Square, VVS-VS
6 x 6 mm (calibrated)
$ 30.76
0.62ct Violet Amethyst, Emerald Cut, VS-SI
6 x 4 mm (calibrated)
$ 3.60
2.73ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 19.03
50.90ct Violet Amethyst, Oval, IF
27 x 20 mm (calibrated)
$ 337.98
2.25ct Violet Amethyst, Trillion, VS
9 x 9 mm (calibrated)
$ 17.26
2.78ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 21.32
8.70ct Violet Amethyst, Pear Shape, VVS-VS
18 x 13 mm (calibrated)
$ 66.15
2.98ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.86
20.06ct Violet Amethyst, Cushion, VVS-VS
20 x 15 mm (calibrated)
$ 139.86
2.89ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 18.99
4.56ct Violet Amethyst, Pear Shape, VVS
15 x 10 mm (calibrated)
$ 29.98
0.49ct Violet Amethyst, Emerald Cut, VS
6 x 4 mm (calibrated)
$ 2.85
2.51ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 18.82
4.03ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 22.08
- Page 1
- Page 2
- Page 3
- Page 4
- Page 5
- Page 6
- Page 7
- Page 8
- Page 9
- Page 10
- Page 11
- Page 12
- Page 13
- Page 14
- Page 15
- Page 16
- Page 17
- Page 18
- Page 19
- Page 20
- Page 21
- Page 22
- Page 23
- Page 24
- Page 25
- Page 26
- Page 27
- Page 28
- Page 29
- Page 30
- Page 31
- Page 32
- Page 33
- Page 34
- Page 35
- Page 36
- Page 37
- Page 38
- Page 39
- Page 40
- Page 41
- Page 42
- Page 43
- Page 44
- Page 45
- Page 46
- Page 47
- Page 48
- Page 49
- Page 50
- Page 51
- Page 52
- Page 53
- Page 54
- Page 55
- Page 56
- Page 57
- Page 58
- Page 59
- Page 60
- Page 61
- Page 62
- Page 63
- Page 64
- Page 65
- Page 66
- Page 67
- Page 68
- Page 69
- Page 70
- Page 71
- Page 72
- Page 73
- Page 74
- Page 75
- Page 76
- Page 77
- Page 78
- Page 79
- Page 80
- Page 81
- Page 82
- Page 83
- Page 84
- Page 85
- Page 86
- Page 87
- Page 88
- Page 89
- Page 90
Why Buy Calibrated Amethyst from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
Precision-Sized Calibrated Amethyst Stones
Our calibrated amethyst gemstones are cut to exact measurements for easy mounting in standard jewelry settings, ensuring consistency across matched designs.
Loose Calibrated Amethyst Online
Browse a wide selection of loose calibrated amethyst stones in popular sizes such as 6 mm, 8 x 6 mm, 10 x 8 mm and more. Each gemstone is photographed individually for accurate online selection.
Standard Sizes for Jewelry Settings
Calibrated amethyst is ideal for ready-made ring mounts, earring settings and pendant designs. Uniform dimensions allow jewelers to work efficiently without custom adjustments.
Faceted and Cabochon Options
Choose from faceted calibrated amethyst for brilliance and sparkle, or smooth cabochons for modern and classic jewelry styles. Available in round, oval, cushion, pear and other popular shapes.
Natural Purple Amethyst
All our calibrated amethyst stones are natural quartz, known for their attractive purple color and good durability (Mohs hardness 7), suitable for everyday jewelry.
Wholesale Calibrated Amethyst
We offer competitive pricing for jewelers and designers who require multiple stones in matching sizes. Calibrated cuts are perfect for production jewelry and repeat designs.
February Birthstone
Amethyst is the traditional February birthstone and is often chosen for meaningful gifts, anniversary jewelry and custom creations.
Why Choose Calibrated Amethyst?
Calibrated stones provide reliable sizing, reduced setting time and consistent results, making them a preferred choice for professional jewelers and custom designers.
Learn more about origins, treatments and care on our Amethyst Information Page.
FAQs
What does calibrated amethyst mean?
Calibrated amethyst refers to gemstones cut to standardized measurements, such as 6 mm round or 8 x 6 mm oval, designed to fit commercial jewelry settings.
Are calibrated amethyst stones natural?
Yes, our calibrated amethyst gemstones are natural. Any treatments are fully disclosed to ensure transparency.
What shapes are available in calibrated amethyst?
Common shapes include round, oval, cushion, pear, emerald cut and more, all cut to precise dimensions for easy mounting.
Is calibrated amethyst suitable for rings?
Yes. With a Mohs hardness of 7, amethyst is durable enough for rings and everyday jewelry when properly set and cared for.
Can I buy matching calibrated amethyst stones?
Yes, calibrated sizes make it easier to select matching stones for earrings, multi-stone rings or production jewelry lines.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 9 
It was fine . Wish there had been more round stones to select from
Overall Rating -> 10 
this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.
Overall Rating -> 10
Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.
Overall Rating -> 9
Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly
Overall Rating -> 8 
I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.
Overall Rating -> 10
Good, hope gem quality is good and genuine
