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 -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

Source: Bizrate

Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

Source: Bizrate

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use as always and in all steps from opening site to paying.

Posted By Pete in February, 2024

Source: Bizrate

Overall Rating -> 10

I loved the opportunity to shop on a website that I could trust 👍

Posted By Will J. Lover in September, 2023

Source: Bizrate

Overall Rating -> 10

Awesome

Posted By Mic in May, 2023

Source: Bizrate

Overall Rating -> 10

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023

Source: Bizrate

Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

Source: Bizrate

Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 10

Easy to navigate

Posted By G Funk in December, 2023

Source: Bizrate

Overall Rating -> 10

Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.

Posted By C.J. in February, 2024

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

Source: Bizrate

Overall Rating -> 10

I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 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.

237

Gemstones A-Z

Buy Round Shape 6.5 mm Gems

49.54 ct Marquise Jasper, 42.2 x 20.4 mm From Indonesia

11.1 ct Yellow Apatite, 15.5 x 11.9 mm Oval Cut From Madagascar

5.15 ct Loose Oval Star Ruby, 8.5 x 7.7 mm From Madagascar

26.3 ct Oval Howlite, 29.3 x 19.9 mm From the United States

27.85 ct Black Spinel, 20.2 x 10 mm Baguette Rose Cut From Thailand

2.72 ct Purple Kunzite, 8.6 x 6.5 mm Cushion Cut From Afghanistan

0.5 ct Yellow Sphalerite, 5 x 4.2 mm Oval Cut From Spain

6.11 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 9.9 mm

2.15 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 9.9 x 5.1 mm

0.76 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5.1 mm

3.86 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 4 x 3.9 mm

5.06 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 9.9 mm

1.8 ct Yellow Sphene, 8.7 x 6.6 mm Oval Cut From Sri Lanka

3.02 ct Blue Star Sapphire, 6.8 x 5 mm Oval Cut From Thailand

2.39 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 11.1 x 6.9 mm

2.62 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 4.9 x 3.2 mm

8.75 ct Oval Actinolite Cat's Eye, 13.9 x 12.4 mm From the United States

0.64 carat Blue Sapphire, Pear Shape loose Sapphire from Sri Lanka, Natural Gem, 6.1 x 4.9 mm

2.82 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gems, 7.9 x 6 mm

1.35 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 4.9 mm

10.68 carat Pear Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 16.9 x 11.9 mm

1.43 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 10 x 8 mm

4.54 ct Fancy Fire Agate, 14.4 x 10.6 mm From Mexico

4.71 ct Orange Sunstone, 9 mm Round Cut From India

4.02 ct White Moonstone, 11.2 x 9 mm Oval Cut From India

29.71 ct Cushion Obsidian, 27.8 x 21.3 mm From the United States

2.05 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5 mm

4.98 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10 x 8.1 mm

1.62 carat Blue Sapphire, Princess-Cut loose Sapphire from Madagascar, Natural Gems, 2.3 x 2.3 mm

1.56 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.9 x 6.3 mm

17.44 ct Loose Oval Lapis Lazuli, 17.3 x 13.2 mm From Afghanistan

5.48 ct Oval Pietersite, 15 x 9.9 mm From Namibia

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT