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

was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

Posted By Kittypie070 in April, 2024

Source: Bizrate

Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

Posted By Sue in April, 2023

Source: Bizrate

Overall Rating -> 10

I FOUND WHAT I WANT IT

Posted By GABY in March, 2024

Source: Bizrate

Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

Source: Bizrate

Overall Rating -> 10

GemSelect has the Best gems. Clear photos and detailed description helps me make the best choice. I have Never been disappointed by thier quality items.

Posted By Rock Hound in July, 2023

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

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

Source: Bizrate

Overall Rating -> 10

LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

Posted By APPS in April, 2024

Source: Bizrate

Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

Source: Bizrate

Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

Source: Bizrate

Overall Rating -> 10

Super easy to do business for great products.

Posted By BoBBy in January, 2024

Source: Bizrate

Overall Rating -> 10

Very detailed and great pictures

Posted By Alexandrite in November, 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

Source: Bizrate

Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

Source: Bizrate

Overall Rating -> 10

I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

Posted By Daws in July, 2023

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

0.73 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.1 x 5.9 mm

9.75 ct Fancy Fire Agate, 17.1 x 13.8 mm From Mexico

4.48 ct Oval Star Ruby, 10.4 x 8.8 mm From Madagascar

4.83 ct Orange Sunstone, 10 x 8.2 mm Oval Cut From India

17.24 ct Yellow Quartz, 19.5 x 15.7 mm Odd Shaped From Brazil

0.02 ct Loose Blue Diamond, 1.8 mm Diamond Cut From India

1.1 ct Purple Spinel, 6.6 x 5.2 mm Cushion Cut From Tanzania

9.74 ct Round Pietersite, 16.9 mm From Namibia

0.44 carat Green Sapphire, Emerald-Cut loose Sapphire from Tanzania, Natural Gem, 5.1 x 3.3 mm

3.89 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 14.5 x 10.8 mm

2.29 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.2 x 4.2 mm

13.78 carat Carved Flower Ruby, loose Certified Ruby from Madagascar, Natural Gem, 17.8 x 17.1 mm

1.5 carat Cushion Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6.8 x 6.5 mm

5.99 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.7 x 10.6 mm

0.26 ct Oval Chrysoberyl Cat's Eye, 4.6 x 3.1 mm From Sri Lanka

6.24 ct Amethyst Geode Slice, 14.9 x 12.6 mm From Brazil

1.84 carat Blue Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 4.5 mm

2.13 ct Cushion Cut Peridot, 8.4 x 6.6 mm From Myanmar

1.51 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.9 x 5.9 mm

1.28 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 6.2 x 6 mm

8.74 carat Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 14.5 x 11.6 mm

21.66 ct Cushion Fossil Coral, 20.8 x 10.6 mm From Indonesia

16.77 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 18.7 x 12.4 mm

0.66 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7.2 x 5.1 mm

0.53 ct Yellow Sphalerite, 4.5 mm Round Cut From Spain

1.55 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm

3.31 ct Green Apatite, 9 x 8.8 mm Asscher Cut From Madagascar

31.6 ct Oval Bloodstone, 35.4 x 23 mm From Madagascar

5.89 ct Drilled Square Rondelle Labradorite, 4.5 x 4.5 mm From Madagascar

4.63 ct Loose Oval Pietersite, 16.3 x 11.4 mm From Namibia

0.21 ct White Diamond, 3.1 mm Diamond Cut From Brazil

5.38 ct Round Rutile Quartz, 12 mm From India

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT