Calibrated Amethyst Gemstones
Shop natural calibrated amethyst in precise sizes ideal for standard jewelry settings.
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Bi-color
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Black
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Blue
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Brown
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Golden
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Gray
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Green
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Multicolor
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Orange
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Pink
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Purple
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Red
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Turquoise
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Violet Calibrated Amethyst
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White Calibrated Amethyst
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
11.79ct Violet Amethyst, Cushion, VVS-VS
15 x 15 mm (calibrated)
$ 82.20
2.99ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 20.85
11.50ct Violet Amethyst, Cushion, VVS
15 x 15 mm (calibrated)
$ 80.18
5.71ctw Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 39.81
2.71ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 18.89
6.30ct Violet Amethyst, Oval, Transparent
14 x 10 mm (calibrated)
$ 36.85
5.36ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 29.37
1.12ctw Violet Amethyst, Marquise, VS
8 x 4 mm (calibrated)
$ 7.44
2.47ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 13.54
4.42ct Violet Amethyst, Pear Shape, VVS
14 x 10 mm (calibrated)
$ 29.05
5.17ct Violet Amethyst, Pear Shape, Transparent
14 x 10 mm (calibrated)
$ 30.89
1.78ct Violet Amethyst, Pear Shape, VVS-VS
10 x 7 mm (calibrated)
$ 11.70
2.37ctw Violet Amethyst, Oval, VS
6 x 4 mm (calibrated)
$ 12.99
2.82ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.47
2.78ct Violet Amethyst, Round, VVS-VS
9 mm (calibrated)
$ 21.32
11.40ct Violet Amethyst, Cushion, VVS
18 x 13 mm (calibrated)
$ 90.84
5.33ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 29.20
1.84ct Violet Amethyst, Heart, VVS
8 x 8 mm (calibrated)
$ 12.83
4.58ct Violet Amethyst, Pear Shape, VVS-VS
15 x 10 mm (calibrated)
$ 32.06
12.17ct Violet Amethyst, Cushion, VVS
18 x 13 mm (calibrated)
$ 96.97
21.40ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 149.20
2.63ct Violet Amethyst, Round, VVS
9.5 mm (calibrated)
$ 20.17
1.76ctw Violet Amethyst, Heart, Transparent
6 x 6 mm (calibrated)
$ 13.50
25.66ct Violet Amethyst, Round, VVS
20 mm (calibrated)
$ 178.90
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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 -> 8 
Good prices
Overall Rating -> 10 
This was my first experience with this company. I had no difficulty finding the item I wanted, and checking out was a breeze! Ia'm hoping my item arrives quickly, intact, and of good quality. Overall, this was a very satisfactory experience.
Overall Rating -> 10
I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.
Overall Rating -> 10
Overall, a very positive experience. I collect FACETED gems and wish there were more faceted items to choose from. The cabachons are greata'just not what I collect.
Overall Rating -> 8
It was a good interaction I got a good gemstone for cheap
Overall Rating -> 10
The website has a good selection, the interface is very intuitive.
