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

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

Source: Bizrate

Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

My first order. I am anxious to see if what I ordered is what I receive.

Posted By KRJ in July, 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

Extremely easy to use, and I am fully satisfied with the purchase process.

Posted By Fl_Beachcomber in October, 2023

Source: Bizrate

Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

Source: Bizrate

Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

Source: Bizrate

Overall Rating -> 10

Love gemselect

Posted By Joshua Howard in March, 2024

Source: Bizrate

Overall Rating -> 10

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

Source: Bizrate

Overall Rating -> 10

The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

Posted By Kuba in December, 2023

Source: Bizrate

Overall Rating -> 10

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

Posted By Teemo in February, 2024

Source: Bizrate

Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

Source: Bizrate

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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

17.33 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 22.3 x 15.1 mm

1.76 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.7 x 5.9 mm

0.48 carat Green Sapphire, Trillion-Cut loose Sapphire from Madagascar, Natural Gem, 5 x 4.8 mm

0.62 ct Oval Checkerboard Peridot, 6.1 x 4.1 mm From China

0.9 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 9.8 x 4.4 mm

4.09 ct Oval Rutile Quartz, 13.1 x 9.2 mm From India

2.74 carat Blue Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 4.6 mm

0.44 ct Loose Pink Sapphire, 5.9 x 4 mm Oval Cut From Madagascar

4.13 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12.1 x 6.1 mm

0.78 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gems, 6.1 x 4.1 mm

4.72 ct Oval Tiger's Eye, 9 x 6.9 mm From Thailand

1.69 ct Loose Heart Cut Sapphire, 4.2 x 4.1 mm From Sri Lanka

0.57 ct Loose Yellow Sapphire, 3.4 x 3.4 mm Princess Cut From Tanzania

0.52 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 4.2 x 4.2 mm

2.93 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.1 x 7.1 mm

0.49 ct Loose Orange Sapphire, 5.1 x 4 mm Octagon Cut From Tanzania

3.36 ct Oval Cut Golden Beryl, 9.1 x 6.9 mm From Madagascar

25.76 ct Brown Moonstone, 19.9 x 15.2 mm Oval Cut From India

5.81 carat Pink Morganite, Pear loose Morganite from Afghanistan, Natural Untreated Gem, 14 x 10.1 mm

0.33 ct Oval Cut Kornerupine, 4.9 x 3.7 mm From Sri Lanka

3.74 ct Fancy Fire Agate, 11.6 x 8.5 mm From Mexico

0.06 ct Green Diamond, 2.4 mm Diamond Cut From India

33.53 ct Fancy Quartz With Marcasite, 37.1 x 14.7 mm From Brazil

44.32 ct Fancy Charoite, 38.5 x 21.9 mm From Russia

8.06 carat Blue Zircon, Pear Shape loose Zircon from Cambodia, Natural Gem, 13.9 x 9.7 mm

0.38 ct Orange Sphalerite, 4 mm Round Cut From Spain

1.77 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

0.85 ct Loose Round Cut Lapis Lazuli, 6.1 mm From Afghanistan

1.49 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.3 x 6.4 mm

1.82 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 8.2 x 6.1 mm

10 ct Pink Kunzite, 12.5 x 9.6 mm Octagon Cut From Afghanistan

7.39 ct Fancy Fire Agate, 13.5 x 11.5 mm From Mexico

Gemstone Information

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Gemstone EDUCATION

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