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 |
0.93ct Violet Amethyst, Square, VVS
6 x 6 mm (calibrated)
$ 7.41
4.05ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 22.19
2.97ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.25
4.03ct Violet Amethyst, Pear Shape, VVS
14 x 10 mm (calibrated)
$ 29.27
5.94ctw Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 47.33
4.64ct Violet Amethyst, Pear Shape, VVS-VS
15 x 10 mm (calibrated)
$ 35.59
3.09ct Violet Amethyst, Square, VVS
9 x 9 mm (calibrated)
$ 24.62
12.96ct Violet Amethyst, Cushion, VVS-VS
16 x 16 mm (calibrated)
$ 103.27
5.67ct Violet Amethyst, Pear Shape, VS
16 x 12 mm (calibrated)
$ 44.85
4.49ct Violet Amethyst, Pear Shape, VVS-VS
14 x 10 mm (calibrated)
$ 29.51
2.81ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 22.39
2.93ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 16.05
4.76ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 26.08
0.58ct Violet Amethyst, Emerald Cut, VS
6 x 4 mm (calibrated)
$ 3.37
4.40ct Violet Amethyst, Round, VVS-VS
11 mm (calibrated)
$ 28.93
3.06ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 21.33
2.51ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 13.75
10.91ct Violet Amethyst, Cushion, VVS
18 x 13 mm (calibrated)
$ 86.93
7.27ctw Violet Amethyst, Oval, Transparent
11 x 9 mm (calibrated)
$ 39.83
3.46ct Violet Amethyst, Oval, Transparent
11 x 9 mm (calibrated)
$ 20.68
5.64ctw Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 39.33
3.07ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 16.82
3.43ct Violet Amethyst, Pear Shape, VS
13 x 9 mm (calibrated)
$ 26.30
8.85ctw Violet Amethyst, Oval, Transparent
12 x 8 mm (calibrated)
$ 48.49
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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 
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 10
I love the product and the details about each of them.
Overall Rating -> 7 
easy interface for a pricless buy
Overall Rating -> 9 
The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.
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 -> 8
It was fine
