Calibrated 18 x 13 mm Pear Shape Natural Loose 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 Pear shapes, facet cut and cabochon gems available now in 18 x 13 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

Great selection

Posted By GHS40 in December, 2023

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Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

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Overall Rating -> 10

The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

Posted By AV in May, 2023

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Overall Rating -> 10

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024

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Overall Rating -> 10

Convenient selection, arrival on time

Posted By Alin in February, 2024

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Overall Rating -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

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Overall Rating -> 10

Excellent site.

Posted By Boru in December, 2023

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Overall Rating -> 9

It was simple and clear to understand.

Posted By Thora007 in December, 2023

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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

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

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Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

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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

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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

Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

Source: Bizrate

Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

Source: Bizrate

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Gemstones A-Z

Buy Pear Shape 18x13 mm Gems

9.07 carat Blue Green Grandidierite, Pear loose Grandidierite from Madagascar, Natural Untreated Gem, 15.7 x 11.4 mm

1.73 carat Green Sapphire, Oval loose Sapphire from Madagascar, Natural Gems, 5 x 4.1 mm

19.96 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 18.2 x 14.2 mm

2 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 7.1 mm

1.47 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 5.9 x 4.9 mm

0.68 ct Marquise Cut Peridot, 8.1 x 4.1 mm From China

24.6 ct Loose Violet Lepidolite, 38.3 x 8.8 mm Pencil Cut From the United States

2.1 carat Blue Tanzanite, Marquise Cut loose Tanzanite from Tanzania, Natural Gems, 7.1 x 3.6 mm

15.48 ct Loose Pear Bloodstone, 28.8 x 16.5 mm From Madagascar

0.5 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 6 x 4.1 mm

3.31 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

4 ct Oval Prehnite, 7.6 x 6.9 mm From South Africa

7.84 ct Loose Pear Dendritic Agate, 14.1 x 10 mm From India

1.67 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 7.9 x 5.2 mm

2.9 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6 x 4.2 mm

25.43 ct Marquise Hematite, 24.5 x 12.8 mm From Brazil

4.82 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.9 x 10 mm

3.88 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

1.06 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 6.1 x 4.1 mm

0.09 ct Green Diamond, 2.9 mm Diamond Cut From India

9.59 ct Oval Quartz With Marcasite, 23.4 x 9.5 mm From Brazil

25.29 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 24.3 x 19 mm

1.7 ct White Moonstone, 9.2 x 7.1 mm Oval Cut From India

0.96 ct Pink Spinel, 6.3 x 5.3 mm Cushion Cut From Tanzania

1.82 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 11.2 x 8 mm

22.93 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20 x 15 mm

2.14 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.5 x 7.1 mm

2.48 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 10.1 x 5.2 mm

21.84 ct Oval Cat's Eye Opal, 22.2 x 14.9 mm From Brazil

1.28 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm

3.26 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

0.8 ct Blue Kyanite, 6.6 x 4.8 mm Oval Cut From Nepal

Gemstone Information

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