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

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

Posted By Ana in September, 2023

Source: Bizrate

Overall Rating -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

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Overall Rating -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

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Overall Rating -> 9

I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

Posted By Sparkle in March, 2024

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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

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 10

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

Posted By JamesMichael781 in September, 2023

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Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

Posted By Steve in November, 2023

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Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

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Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

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Overall Rating -> 10

The site was easy to shop and the payment was secure. I’m looking forward to receiving my order!

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Overall Rating -> 10

Great experience! First time buyer

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Overall Rating -> 10

No issues at all. It was great.

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Overall Rating -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

Posted By Spinach in May, 2023

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Overall Rating -> 10

Gem Select has gems at afffordable prices.

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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

18.34 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 28 x 15.9 mm

14.9 ct Oval Malachite, 18.1 x 12.9 mm From Congo

4.29 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

1.68 ct Violet Spinel, 7.7 x 6.5 mm Cushion Cut From Tanzania

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

58.15 carat Pear Chrysocolla, loose Certified Chrysocolla from Australia, Natural Untreated Gem, 42 x 27.2 mm

0.14 ct Marquise Cut Iolite, 6.1 x 2.9 mm From Madagascar

6.4 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14 x 10 mm

1.7 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 5.8 mm

0.07 ct Black Diamond, 2 mm Diamond Cut From India

0.48 carat Orange Spessartite Garnet, Round loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 4.6 mm

66.26 ct Round Checkerboard Nuummite, 28.5 mm From India

0.98 ct Yellow Beryl, 8.1 x 7.4 mm Trillion Cut From Madagascar

2.68 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.9 x 9.6 mm

0.72 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5 mm

4.11 ct Pink Kunzite, 8.2 x 7.8 mm Octagon Cut From Afghanistan

0.57 ct Loose Purple Sapphire, 5.8 x 4.2 mm Oval Cut From Tanzania

8.18 carat Yellow Citrine, Briolette loose Citrine from Brazil, Natural Untreated Gem, 16 mm

1.42 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.1 x 6.1 mm

15.12 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 15.8 x 11.7 mm

7.18 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

2.39 ct Oval Quartz With Marcasite, 10.5 x 8.3 mm From Brazil

3.95 ct Round Checkerboard Smoky Quartz, 8.1 mm From Brazil

0.93 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8.9 x 6.9 mm

4.15 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9 mm

3.25 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9 mm

1.09 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm

1.55 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5 mm

5.35 carat Bi-color Ametrine, Emerald-Cut loose Ametrine from Brazil, Natural Untreated Gem, 12.9 x 9.5 mm

1.33 carat Pear Shape Rainbow Moonstone, loose Certified Rainbow Moonstone from India, Natural Untreated Gems, 5.1 x 5 mm

6.81 ct Carved Prehnite, 16 x 11.5 mm From South Africa

0.81 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gem, 6.1 x 4.9 mm

Gemstone Information

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