Calibrated 10 x 8 mm Octagon Shape Natural Gemstones: GemSelect

Some people by 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 Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 10 x 8 mm 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

Source: Bizrate

Overall Rating -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

Source: Bizrate

Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 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

Overall Rating -> 10

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Excellent site.

Posted By Boru in December, 2023

Source: Bizrate

Overall Rating -> 10

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024

Source: Bizrate

Overall Rating -> 10

Easy to use as always and in all steps from opening site to paying.

Posted By Pete in February, 2024

Source: Bizrate

Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

Source: Bizrate

Overall Rating -> 10

Great website and information

Posted By Moonshot in December, 2023

Source: Bizrate

Overall Rating -> 10

all good

Posted By John in December, 2023

Source: Bizrate

Overall Rating -> 10

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

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

Source: Bizrate

Overall Rating -> 10

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

Posted By Bjorn in January, 2024

Source: Bizrate

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT

183/24-25 Moo 4, Trirat Rd.
T. Chantanimit, A. Muang
Chanthaburi 22000
THAILAND
Phone: 1-800-464-1640
Phone: +66-39601289

STAY IN TOUCH | NEWSLETTER

*You're signing up to receive GemSelect promotional email.

Switch to Mobile Version

Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.

255

Gemstones A-Z

Buy Octagon Shape 10x8 mm Gems

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

0.9 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 5.1 mm

1.5 ct Yellow Sphene, 6.9 x 5.8 mm Oval Cut From Sri Lanka

35.89 ct Pencil Cut Jasper, 41.2 x 11.8 mm From Indonesia

0.61 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 6 x 4.1 mm

2.88 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 8.1 x 6.4 mm

2.9 ct Oval Tiger's Eye, 8.2 x 6.1 mm From Thailand

1.85 carat Round Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 mm

5.58 ct Loose Pear Dendritic Agate, 13.8 x 9.9 mm From India

3.75 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5 mm

1.59 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 x 5.1 mm

20.29 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18.5 x 14.5 mm

3.34 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.9 x 8.3 mm

27.63 ct Oval Jasper, 24.8 x 14.5 mm From Indonesia

4.81 ct Oval Larimar, 14.2 x 10 mm From the Dominican Republic

2.24 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 9.1 mm

2.09 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 9.1 x 7.5 mm

5.25 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13.4 x 10.5 mm

4.71 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.2 x 8.1 mm

1.21 ct Oval Cut Strawberry Quartz, 8.1 x 6.1 mm From Russia

0.38 ct Loose Yellow Sapphire, 5 x 3.1 mm Octagon Cut From Tanzania

8.62 carat Pear Shape Mystic Quartz, loose Certified Mystic Quartz from Brazil, Natural Gem, 18.2 x 13.1 mm

2.95 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9.1 mm

35.36 ct Oval Idocrase, 35 x 25.4 mm From the United States

5.8 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9 x 9 mm

1.22 carat Green Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.9 x 5.9 mm

22.78 ct Oval Fossil Coral, 21.6 x 13.7 mm From Indonesia

4.89 ct Diamond Cut Smoky Quartz, 11.6 mm From Brazil

1.23 ct Loose Orange Hessonite Garnet, 7.1 x 5.7 mm Oval Cut From Madagascar

7.06 ct Baguette Rainbow Moonstone, 14.5 x 7.4 mm From the United States

3.61 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 5.9 x 4 mm

5.45 ct Round Rutile Quartz, 11.1 mm From India

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT