Calibrated 14 x 12 mm Octagon Shape Gemstones from 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 14 x 12 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.

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Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

Source: Bizrate

Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 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

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Overall Rating -> 10

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

Posted By GemGrammy in January, 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 -> 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

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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 -> 10

Great site

Posted By Lord of Bananas in November, 2023

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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

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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

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

Source: Bizrate

Overall Rating -> 7

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

Posted By Steve in November, 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 -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

Source: Bizrate

Overall Rating -> 10

Trustworthy site. I've had several good experiences with company. Products always have met my expectations. Thank you.

Posted By Ray in February, 2024

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Gemstones A-Z

Buy Octagon Shape 14x12 mm Gems

0.58 ct Orange Sphalerite, 5.2 x 4.4 mm Oval Cut From Spain

0.44 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gem, 4.2 mm

23.01 ct Baguette Hematite, 19.7 x 16.7 mm From Brazil

3.46 ct Diamond Cut Andalusite, 3.7 mm From Brazil

4.9 ct Oval Cut Peridot, 7.7 x 5.9 mm From China

2.23 carat Pear Shape Kornerupine, loose Certified Kornerupine from Sri Lanka, Natural Untreated Gems, 5.9 x 4.5 mm

7.8 carat Blue Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 13.1 x 9.3 mm

1.26 ct Purple Spinel, 6.3 x 5.6 mm Cushion Cut From Tanzania

1.36 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 6.3 mm

0.58 ct Blue Kyanite, 3.7 mm Round Cut From Nepal

1.5 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.2 x 3.6 mm

3.93 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11 mm

9.42 ct Oval Star Moonstone, 12.9 x 10.6 mm From India

2 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gems, 7.3 x 5.1 mm

0.8 ct Loose Cushion Cut Smoky Quartz, 7.2 x 5.1 mm From Brazil

1.06 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5.8 mm

1.15 carat Orange Hessonite Garnet, Baguette Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.2 x 4.5 mm

0.19 ct White Diamond, 2.9 mm Diamond Cut From Brazil

5.76 carat Pink Topaz, Round loose Topaz from Brazil, Natural Gem, 11.1 mm

0.88 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 5.2 x 5.1 mm

35.83 ct Oval Jasper, 37.4 x 26.3 mm From Indonesia

12.41 carat Bi-color Tourmaline, Carved Fish loose Tourmaline from Mozambique, Natural Untreated Gem, 23.7 x 16.8 mm

12.34 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 18.2 x 13.1 mm

1.39 carat Blue Tanzanite, Round loose Tanzanite from Tanzania, Natural Gem, 7 mm

3.4 carat Orange Zircon, Emerald Cut loose Zircon from Tanzania, Natural Untreated Gems, 7.1 x 5 mm

2.54 carat Blue Sapphire, Princess-Cut loose Sapphire from Madagascar, Natural Gems, 2.6 x 2.5 mm

1.02 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 7.6 x 5.6 mm

32.58 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 27.7 x 20.9 mm

1 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 4.9 x 4.9 mm

4.42 ct Loose Pear Star Ruby, 9.2 x 8.4 mm From Madagascar

2.61 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.3 x 7.7 mm

3.04 ct Blue Green Grandidierite, 10.4 x 8.3 mm Oval Cut From Madagascar

Gemstone Information

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