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 -> 10

Selection and purchasing online was very easy

Posted By Aggy in January, 2024

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Overall Rating -> 10

Found what I was looking for

Posted By Rian in June, 2023

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Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia in January, 2024

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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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

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Overall Rating -> 8

I am currently pleased. I like the layout of the website.

Posted By RayPoppa in January, 2024

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Overall Rating -> 9

I have been buy from you for years

Posted By JohnA in May, 2023

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

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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

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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.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 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

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Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

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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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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

1.51 ct Oval Sillimanite Cat's Eye, 7.6 x 5.1 mm From Madagascar

9.67 ct Oval Tiger's Eye, 18.4 x 13.5 mm From India

4.28 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12 x 9.9 mm

83.06 carat Pear Shape Rose Quartz, loose Certified Rose Quartz from South Africa, Natural Untreated Gem, 32.6 x 24.9 mm

1.83 ct Round Cut Peridot, 4 mm From China

2.23 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6 mm

14.04 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 13.9 x 10.1 mm

1.12 ct Loose Square Cut Sapphire, 2.2 x 2.1 mm From Tanzania

3.34 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 11 x 7.7 mm

5.06 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gem, 10 x 10 mm

1.17 ct Oval Sillimanite Cat's Eye, 7.8 x 5.2 mm From Madagascar

1.29 carat Orange Sunstone, Oval loose Sunstone from India, Natural Untreated Gem, 8.1 x 6.1 mm

16.29 ct Oval Rainbow Moonstone, 20.4 x 13 mm From the United States

6.42 carat Sky Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 9.1 mm

1.11 ct Marquise Cut Peridot, 8 x 4.1 mm From China

30.44 ct Carved Ruby-Zoisite, 25.4 x 16.8 mm From Tanzania

9.91 ct Yellow Quartz, 16.1 x 13.9 mm Star Cut From Brazil

1.06 ct Oval Cut Color-Change Diaspore, 6.9 x 5.5 mm From Turkey

3.93 carat Pink Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gems, 4.9 x 3.1 mm

0.65 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 5.1 x 5.1 mm

1 ct Oval Strawberry Quartz, 7.5 x 5.9 mm From Russia

2.86 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 24.9 x 3.7 mm

1.83 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gem, 8 x 6.1 mm

1.05 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.6 x 5 mm

1.24 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 5.9 mm

2.85 carat Pink Malaya Garnet, Round loose Malaya Garnet from Tanzania, Natural Untreated Gem, 8.2 mm

3.78 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.8 x 4.9 mm

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

7.14 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 12.2 x 10.1 mm

1.68 ct Loose Orange Moonstone, 9.8 x 5.4 mm Marquise Cut From India

9.05 ct Oval Tiger's Eye, 14 x 9.9 mm From Thailand

13.95 carat Bi-color Ametrine, Oval loose Ametrine from Bolivia, Natural Untreated Gem, 19.4 x 13.9 mm

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