Calibrated 7 x 5 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 7 x 5 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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Thank you for trusting us with your purchase!

Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 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 -> 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

Todo muy bien en la compra ahora esperar recibir el pedido.

Posted By MAGSMX in August, 2023

Source: Bizrate

Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 2024

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

Selection and purchasing online was very easy

Posted By Aggy in January, 2024

Source: Bizrate

Overall Rating -> 10

I find the website user friendly.

Posted By Becky in August, 2023

Source: Bizrate

Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

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

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

Source: Bizrate

Gemstones A-Z

Buy Octagon Shape 7x5 mm Gems

2.85 ct Loose Orange Sapphire, 5 mm Round Cut From Tanzania

0.61 ct Blue Kyanite, 3.7 mm Round Cut From Nepal

33.9 ct Oval Chrysocolla, 33.1 x 19.2 mm From Australia

2.48 ct Loose Orange Moonstone, 14 x 6.8 mm Marquise Cut From India

4.68 ct Round Cut Strawberry Quartz, 11 mm From Russia

0.6 carat Yellow Beryl, Pear Shape loose Beryl from Brazil, Natural Untreated Gem, 7 x 4.7 mm

1.57 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.8 x 6.5 mm

4.97 ct Oval Chrysoprase, 12.5 x 9.5 mm From Madagascar

1.06 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 6.1 x 4 mm

1.46 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5 mm

1.37 carat Brown Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.3 x 6 mm

12.86 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 17.1 x 13.5 mm

2.1 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 9 x 7 mm

0.7 ct Loose Yellow Sapphire, 5.2 mm Round Cut From Tanzania

1.88 ct Loose Oval Cut Black Opal, 9.9 x 7.8 mm From Ethiopia

3.95 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.2 x 5.1 mm

11.03 ct Octagon Cut Smoky Quartz, 13.7 x 13.5 mm From Brazil

0.85 ct Blue Kyanite, 6 mm Round Cut From Nepal

1.87 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.1 x 6.1 mm

7.16 ct Oval Star Moonstone, 13.9 x 10.2 mm From India

1.81 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 5.9 x 3.9 mm

50.56 ct Yellow Quartz, 26.2 x 20.2 mm Oval Cut From Brazil

3.02 carat Pear Prehnite, loose Certified Prehnite from South Africa, Natural Untreated Gems, 9.4 x 5.8 mm

0.47 ct Loose Orange Sapphire, 4.5 x 4.5 mm Cushion Cut From Tanzania

13.68 ct Round Cut Smoky Quartz, 16.9 mm From Brazil

11.49 ct Oval Star Moonstone, 14 x 10.1 mm From India

11.97 ct Odd Shaped Jasper, 22.3 x 12.9 mm From India

0.93 ct Oval Cut Kornerupine, 7.5 x 5 mm From Sri Lanka

1.41 ct Yellow Beryl, 9.2 x 6.9 mm Oval Cut From Madagascar

5.76 ct Carved Prehnite, 16.3 x 10.3 mm From South Africa

0.9 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.7 mm

1.64 ct Loose Oval Concave Cut Mystic Quartz, 9.1 x 7.1 mm From Brazil

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