Buy 13 mm Round Calibrated Gemstones from GemSelect

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Round shapes, facet cut and cabochon gems available now in 13 mm diameter size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not usually expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often around 0.3 mm or slightly higher even. This small variance can usually be accommodated for standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

Read All

Gemstone Information

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

Source: Bizrate

Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024

Source: Bizrate

Overall Rating -> 10

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024

Source: Bizrate

Overall Rating -> 8

I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

Posted By Mark in March, 2024

Source: Bizrate

Overall Rating -> 10

Always have good experience

Posted By Ginnie in September, 2023

Source: Bizrate

Overall Rating -> 10

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

Posted By Joe in January, 2024

Source: Bizrate

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

Source: Bizrate

Overall Rating -> 10

The website is easy to navigate and the images are incredible.

Posted By Lindsy in October, 2023

Source: Bizrate

Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 2024

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Overall Rating -> 10

My first order. I am anxious to see if what I ordered is what I receive.

Posted By KRJ in July, 2023

Source: Bizrate

Overall Rating -> 10

Everything fine.

Posted By Hilario in December, 2023

Source: Bizrate

Overall Rating -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

Source: Bizrate

Overall Rating -> 10

Extremely easy to use, and I am fully satisfied with the purchase process.

Posted By Fl_Beachcomber in October, 2023

Source: Bizrate

Overall Rating -> 10

I FOUND WHAT I WANT IT

Posted By GABY in March, 2024

Source: Bizrate

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT

183/24-25 Moo 4, Trirat Rd.
T. Chantanimit, A. Muang
Chanthaburi 22000
THAILAND
Phone: 1-800-464-1640
Phone: +66-39601289

STAY IN TOUCH | NEWSLETTER

*You're signing up to receive GemSelect promotional email.

Switch to Mobile Version

Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.

954

Gemstones A-Z

Buy Round Shape 13 mm Gems

8.33 ct Oval Strawberry Quartz, 15.6 x 11.8 mm From Russia

64.2 ct Amethyst Geode Slice, 35.3 x 32.9 mm From Brazil

4.66 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.8 x 10 mm

0.34 ct Green Sphene, 4.3 mm Round Cut From Sri Lanka

1.54 ct Purple Spinel, 6.6 x 6.2 mm Cushion Cut From Tanzania

4.7 ct Oval Cut Strawberry Quartz, 9.9 x 8 mm From Russia

0.82 carat Green Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.1 mm

0.16 ct Black Diamond, 2.1 x 2 mm Princess Cut From India

9.58 carat Swiss Blue Topaz, Ball loose Topaz from Brazil, Natural Gems, 8.1 mm

38.36 ct Fancy Jasper, 36.8 x 18.5 mm From Indonesia

2.98 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10 x 8 mm

0.78 ct Square Cut Color-Change Diaspore, 5.4 x 5.3 mm From Turkey

17.63 ct Fancy Boulder Opal, 23.8 x 14.9 mm From Australia

4.08 ct Fancy Fire Agate, 10.9 x 9 mm From Mexico

1.24 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.2 x 5.6 mm

12.68 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 14.1 x 10.1 mm

2.5 ct Round Cut Strawberry Quartz, 7 mm From Russia

1.15 ct Green Sphene, 6.9 x 5.2 mm Oval Cut From Sri Lanka

3.32 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 9 mm

1.09 ct Cushion Cut Color-Change Diaspore, 6.7 x 5.9 mm From Turkey

1 ct Pink Morganite, 7.6 x 6 mm Oval Cut From Afghanistan

1.96 ct Round Onyx, 5.5 mm From Sri Lanka

6.34 ct Blue Green Grandidierite, 14.8 x 10.5 mm Oval Cut From Madagascar

1.59 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.1 x 7.9 mm

0.66 carat Purple Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6.2 x 4.9 mm

45.92 carat Pear Rhodonite, loose Certified Rhodonite from Australia, Natural Untreated Gem, 32.9 x 22.3 mm

18.08 ct Rainbow Pyrite, 22 x 14.9 mm From Russia

4.3 ct Round Labradorite, 10.2 mm From Madagascar

21.68 ct Yellow Quartz, 16.9 x 13.1 mm Carved From Brazil

1.41 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 6 x 6 mm

11.44 ct Round Labradorite, 11.2 mm From Madagascar

0.74 ct Loose Pink Tourmaline, 5.6 mm Round Cabochon From Mozambique

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT