Buy 6.5 mm Round Calibrated Gemstones from GemSelect

Some people buy 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 6.5 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 even slightly higher. 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 -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

Source: Bizrate

Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

Posted By Ray in December, 2023

Source: Bizrate

Overall Rating -> 10

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

Posted By Oakcityceo in May, 2023

Source: Bizrate

Overall Rating -> 10

Purchasing from Gem Select was a pleasant and easy experience. The photos of the stones I was interested in were an accurate depiction of the stones I received. Ordering was easy and the items arrived within a week. Over all it was a very positive experience.

Posted By Dee in September, 2023

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

Todo muy bien en la compra ahora esperar recibir el pedido.

Posted By MAGSMX in August, 2023

Source: Bizrate

Overall Rating -> 10

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024

Source: Bizrate

Overall Rating -> 10

I FOUND WHAT I WANT IT

Posted By GABY in March, 2024

Source: Bizrate

Overall Rating -> 10

I particularly like information about product provided with purchase.

Posted By Dick in May, 2023

Source: Bizrate

Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

Source: Bizrate

Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

Posted By Sue in April, 2023

Source: Bizrate

Overall Rating -> 10

I have used Gem Select many times over the past 10 years and have always been happy with the product & services

Posted By Ordain in August, 2023

Source: Bizrate

Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

Source: Bizrate

Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

Source: Bizrate

Overall Rating -> 10

I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

Posted By Chico in May, 2023

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.

237

Gemstones A-Z

Buy Round Shape 6.5 mm Gems

0.7 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.6 x 4 mm

50.74 carat Oval Tiger's Eye, loose Certified Tiger's Eye from Thailand, Natural Untreated Gem, 37.7 x 25 mm

0.65 ct Loose Pink Sapphire, 6.9 x 5.7 mm Odd Shaped From Madagascar

23.8 ct Loose Cushion Charoite, 18.7 x 18.6 mm From Russia

1.18 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.9 x 2.9 mm

2.98 ct Round Cut Rainbow Moonstone, 9 mm From the United States

4.82 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 11 x 8.8 mm

4.86 ct Pink Morganite, 13.1 x 10 mm Oval Cut From Afghanistan

2.17 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

1.2 ct Marquise Cut Peridot, 8.1 x 4.1 mm From China

47.12 ct Oval Checkerboard Nuummite, 37.9 x 22.2 mm From India

22.77 ct White Amazonite, 33.4 mm Pencil Cut From Madagascar

0.41 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.7 x 3.6 mm

19.16 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18.1 x 14.1 mm

0.92 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5.3 x 5.3 mm

5.53 ct Brown Moonstone, 12.4 x 12.3 mm Carved From India

7.32 ct Green Agate, 13.9 x 11.7 mm Oval Cut From India

60.15 ct Round Labradorite, 25.3 mm From Madagascar

3.66 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

0.82 ct Loose Pink Sapphire, 4.9 x 3.8 mm Oval Cabochon From Tanzania

12.29 ct Oval Cut Strawberry Quartz, 16.3 x 13.2 mm From Russia

6.26 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 10 mm

23.34 ct Oval Boulder Opal, 20.8 x 14 mm From Australia

0.36 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.9 mm

4.55 ct Orange Sunstone, 8.8 mm Round Cut From India

2.07 carat Round Pyrope Garnet, loose Certified Pyrope Garnet from Madagascar, Natural Untreated Gems, 2.2 mm

4.08 carat White Zircon, Diamond-Cut loose Zircon from Colombia, Natural Gems, 6.9 mm

0.88 ct Purple Spinel, 6 x 5 mm Cushion Cut From Tanzania

6.6 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 17.5 x 7 mm

16.09 ct Oval Malachite, 14 x 10.1 mm From Congo

1.96 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.3 x 6.9 mm

0.12 ct Square Cut Iolite, 3.1 x 3 mm From Madagascar

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT