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 |
2.89ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 22.16
6.34ct Violet Amethyst, Pear Shape, VVS-VS
15 x 10 mm (calibrated)
$ 43.82
7.69ctw Violet Amethyst, Oval, Transparent
11 x 9 mm (calibrated)
$ 30.42
5.41ct Violet Amethyst, Pear Shape, VS
15 x 10 mm (calibrated)
$ 41.49
4.17ct Violet Amethyst, Oval, Transparent
11 x 9 mm (calibrated)
$ 24.92
1.90ctw Violet Amethyst, Marquise, VS
10 x 5 mm (calibrated)
$ 12.62
18.19ct Violet Amethyst, Round, VS
18 mm (calibrated)
$ 126.82
2.53ctw Violet Amethyst, Oval, VVS-VS
6 x 4 mm (calibrated)
$ 13.86
2.80ct Violet Amethyst, Trillion, VVS-VS
10 x 10 mm (calibrated)
$ 22.31
2.19ct Violet Amethyst, Trillion, VVS-VS
9 x 9 mm (calibrated)
$ 16.79
4.05ct Violet Amethyst, Pear Shape, VVS-VS
14 x 10 mm (calibrated)
$ 29.42
3.13ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 23.46
15.91ct Violet Amethyst, Emerald Cut, VVS
18 x 13 mm (calibrated)
$ 110.92
4.11ct Violet Amethyst, Pear Shape, VVS-VS
14 x 10 mm (calibrated)
$ 27.02
15.55ct Violet Amethyst, Emerald Cut, VVS-VS
18 x 13 mm (calibrated)
$ 108.41
12.53ct Violet Amethyst, Cushion, VVS
18 x 13 mm (calibrated)
$ 99.84
7.61ctw Violet Amethyst, Oval, Transparent
10 x 8 mm (calibrated)
$ 41.69
2.65ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 20.33
12.31ct Violet Amethyst, Cushion, VVS
15 x 15 mm (calibrated)
$ 85.82
3.01ct Violet Amethyst, Trillion, VS
10 x 10 mm (calibrated)
$ 23.09
4.03ct Violet Amethyst, Pear Shape, VS
15 x 10 mm (calibrated)
$ 30.64
17.34ct Violet Amethyst, Oval, IF
20 x 15 mm (calibrated)
$ 115.14
11.97ctw Violet Amethyst, Oval, Transparent
14 x 10 mm (calibrated)
$ 47.34
8.14ctw Violet Amethyst, Oval, Transparent
12 x 8 mm (calibrated)
$ 44.59
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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 
The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.
Overall Rating -> 10
I was able to find what I've been looking for.
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 -> 9
Everything was good, the purchase was what I expected and what they show is what you get.
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 liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.
