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

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

Source: Bizrate

Overall Rating -> 10

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024

Source: Bizrate

Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

Source: Bizrate

Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use,I have spent many hours looking at the site

Posted By Skip in November, 2023

Source: Bizrate

Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 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

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

Posted By JAB93 in June, 2023

Source: Bizrate

Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 2024

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

Everything fine.

Posted By Hilario in December, 2023

Source: Bizrate

Overall Rating -> 10

Hello: You do have good website. Vast majority of folks would buy the Gems for its spiritual, physical / energy level, emotional level positive aspects. You have only very brief mention of this aspect of each Gem ..may be you can add little bit more about ways to leverage the beneificial effect of each gems i.e. some practical tips.ThanksRupen Patel

Posted By EarthDeep in February, 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

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

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

Posted By Genia in January, 2024

Source: Bizrate

Gemstones A-Z

Buy Round Shape 6.5 mm Gems

2.2 carat Red Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 9.2 x 7 mm

10.85 carat Green Tourmaline, Carved Flower loose Tourmaline from Mozambique, Natural Untreated Gem, 19.4 x 18.2 mm

1.42 ct Oval Cut Andalusite, 5 x 3.1 mm From Brazil

3.99 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 7.1 x 5.1 mm

0.45 ct Loose Orange Sphalerite, 4.5 mm Round Cut From Spain

42.76 ct Cushion Hematite, 24.6 x 21.6 mm From Brazil

3.92 ct Round Cut Peridot, 5.8 mm From China

3.11 carat Red Spessartite Garnet, Round loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 5.1 mm

6.2 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.5 x 11.3 mm

6.89 ct Green Amazonite, 17.8 x 9.1 mm Marquise Cut From Madagascar

4.81 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 9.9 mm

11.9 carat Pear Seraphinite, loose Certified Seraphinite from Russia, Natural Untreated Gems, 14.1 x 10.1 mm

1.62 ct Orange Sunstone, 9 x 6.9 mm Oval Cut From India

1.42 carat Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 9.1 mm

0.53 ct Loose Purple Sapphire, 5.5 x 4.4 mm Oval Cut From Tanzania

4.91 ct Black Star Sapphire, 9.8 x 7.5 mm Oval Cut From Thailand

37.08 carat Pear Hematite, loose Certified Hematite from Brazil, Natural Untreated Gem, 24.5 x 18.4 mm

29.01 ct Oval Jasper, 29.2 x 14.5 mm From Indonesia

0.73 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.1 x 6 mm

3.84 ct Round Cut Smoky Quartz, 10.6 mm From Brazil

4.05 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 9.8 x 5 mm

15.86 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 25.7 x 16.9 mm

1.72 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 7.8 x 7.7 mm

1.4 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.5 x 3.3 mm

0.74 ct Blue Kyanite, 6.9 x 4.9 mm Oval Cut From Nepal

3.22 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10.7 x 7.6 mm

1.37 ct Green Sphene, 7.1 x 5.8 mm Oval Cut From Sri Lanka

6.01 ct Loose Carved Amethyst, 19.3 x 8.7 mm From Brazil

1.6 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 6.2 x 6.1 mm

1.67 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.1 mm

19.23 ct Square Rainbow Moonstone, 17.2 x 16.2 mm From the United States

3.09 carat Orange Spessartite Garnet, Round loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 4.6 mm

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT