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.

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Overall Rating -> 9

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Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

Posted By DanM in November, 2023

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Overall Rating -> 10

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Overall Rating -> 10

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Overall Rating -> 10

Selection and purchasing online was very easy

Posted By Aggy in January, 2024

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Overall Rating -> 10

Great selection of various gems, easy to navigate site

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Overall Rating -> 10

Easy to use website, made it very easy to buy. Will shop here again.

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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

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Overall Rating -> 10

LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

Posted By APPS in April, 2024

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Overall Rating -> 10

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

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Overall Rating -> 10

I have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

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Overall Rating -> 10

I have used this site for sseveral years now. All has been great. I started collection gems from GemSelect for years and wanted to collect at least one of most stones. I loved Safers because the mols is a 9 + and they come in every color. This is the best place to buy gems for the assortment and price. Great place to learn about gems too. Sometimes the shipping is a little on the long side. But I would give them a 9.9 out of 10 !!

Posted By Steve in July, 2023

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Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

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Overall Rating -> 10

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

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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

2.54 carat Blue Green Fluorite, Cushion loose Fluorite from India, Natural Untreated Gem, 9 x 6.3 mm

66.54 carat Pear Hematite, loose Certified Hematite from Brazil, Natural Untreated Gems, 24.7 x 16.4 mm

94.13 ct Round Jasper, 41.5 mm From Indonesia

2.1 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.3 x 3.9 mm

12.47 ct Yellow Quartz, 16.1 x 15.5 mm Carved From Brazil

0.9 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4.1 mm

6.66 ct Round Rutile Quartz, 12.4 mm From India

6.91 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 14 x 9.9 mm

20.2 ct Trillion Jasper, 21.3 x 16.5 mm From Indonesia

0.81 carat London Blue Topaz, Square loose Topaz from Brazil, Natural Gem, 5.1 x 5.1 mm

8.87 ct Asscher Cut Rose Quartz, 12.9 x 12.8 mm From South Africa

4.74 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.7 x 10.4 mm

0.55 ct Loose Purple Sapphire, 5.9 x 4.1 mm Oval Cut From Tanzania

4.67 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.1 x 10.1 mm

1.69 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.1 x 5.9 mm

10.95 ct Heart Jasper, 18.4 x 13.1 mm From Indonesia

3.95 ct Black Star Sapphire, 10.5 x 8 mm Oval Cut From Thailand

6.4 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.7 x 11.2 mm

13.97 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 25.5 x 12.6 mm

2.6 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9 x 7.1 mm

2.08 ct Yellow Sillimanite, 8.6 x 6.8 mm Oval Cut From Sri Lanka

15.21 ct Green Jadeite, 19.2 x 13.8 mm Oval Cut From Myanmar

3.95 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.8 mm

3.45 ct Orange Agate, 8.9 x 7 mm Oval Cut From India

2.23 carat London Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 9.8 x 5.1 mm

3.25 ct Orange Andesine Labradorite, 10.4 x 8.3 mm Oval Cut From Congo

1.31 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5 mm

2.45 ct Orange Sunstone, 8.7 mm Round Cut From India

1.06 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 8.5 x 4.7 mm

1.69 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.2 mm

2.26 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.1 mm

2.72 ct Oval Smoky Quartz, 8 x 6.1 mm From Brazil

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