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 |
2.92ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 20.36
13.47ctw Violet Amethyst, Oval, Transparent
14 x 10 mm (calibrated)
$ 61.49
14.65ctw Violet Amethyst, Oval, Transparent
14 x 10 mm (calibrated)
$ 80.26
5.86ctw Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 40.85
4.91ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 26.90
2.86ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.79
3.21ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.38
1.02ctw Violet Amethyst, Marquise, VS
8 x 4 mm (calibrated)
$ 6.77
2.34ct Violet Amethyst, Trillion, VVS-VS
9 x 9 mm (calibrated)
$ 15.38
2.87ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.87
2.57ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 14.09
0.60ct Violet Amethyst, Emerald Cut, VS
6 x 4 mm (calibrated)
$ 3.49
5.71ctw Violet Amethyst, Oval, Transparent
12 x 8 mm (calibrated)
$ 31.28
17.07ct Violet Amethyst, Oval, IF
20 x 15 mm (calibrated)
$ 113.34
6.53ct Violet Amethyst, Heart, Transparent
14 x 12 mm (calibrated)
$ 32.52
1.99ct Violet Amethyst, Heart, VVS
8 x 8 mm (calibrated)
$ 13.88
3.01ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 20.98
2.54ctw Violet Amethyst, Oval, VS
6 x 4 mm (calibrated)
$ 13.91
8.38ctw Violet Amethyst, Oval, Transparent
11 x 9 mm (calibrated)
$ 45.91
11.88ct Violet Amethyst, Cushion, VVS-VS
18 x 13 mm (calibrated)
$ 78.88
1.75ctw Violet Amethyst, Marquise, VS
10 x 5 mm (calibrated)
$ 11.62
3.90ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 21.36
3.02ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 23.16
2.89ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 15.84
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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 -> 10 
Wonderful purchase, can't wait to see the stone.
Overall Rating -> 10
Great prices!!! High quality gemstones.
Overall Rating -> 10
The website has a good selection, the interface is very intuitive.
Overall Rating -> 10
Easy to conduct search, good amount of stock to select from along with variety of prices.
Overall Rating -> 10
Was a good experience.
Overall Rating -> 10
This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.
