Buy 15 mm Round Calibrated Gemstones from GemSelect

How are 15 mm Round Shape Gems Sold ?

GemSelect’s Round Shape Calibrated 15mm gems for new designs or replacements available at competitive prices. Our selections are available as single stones, pairs, and lots in this large calibrated size. Select from Faceted Gemstones, Drilled-Spheres, and Sphere-Ball Cut Jewels in a variety of both semiprecious and precious stones.

We have a large selection of Cabochons available in 15 mm Round and Calibrated Size too!

What are Good Designs for 15mm Round Gems?

We suggest using round gemstones of this size in necklace designs, earrings, large rings, bracelets, and as pendants or elements to a larger arrangement. Our selections include many different materials with varying properties and design applications and always at affordable prices.

What are Good Ideas for GemSelects 15 mm Round Shape?

GemSelect's round stones can create extraordinary pieces when combined in multi-color or single color compositions. A 15mm stone can be striking on its own when used as a pendant enabling the color of the gem and metal used make the beauty in the design. For rings, we find a 15mm center stone in a single stone composition beautiful.

As always, jewelry is the most popular gift for your loved ones as Anniversary gifts, and our quality stones are sure to impress your customers allowing them to find something genuinely stunning for their special occasions. Another excellent idea for all Natural Gemstone Jewelry is Birthstone Gifts; please check out our page for information on which gem type to select.

Details About Calibrated Sizes.

GemSelect’s Round 15mm Calibrated gemstones range in size from 15.5mm - 14.4mm in all of our selected precious and semi-precious stones. Our inventory includes large amounts of Color-Change Fluorite, Smoky Quartz, Rutile Quartz, and many other unique jewels of this 15mm size.

GemSelect Welcomes Your Questions and Suggestions.

Please contact us if you have any questions, comments, or suggestions directly at help@gemselect.com. Thank you for choosing GemSelect!

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Thank you for trusting us with your purchase!

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

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024

Source: Bizrate

Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 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

Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

Source: Bizrate

Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 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

Source: Bizrate

Overall Rating -> 10

Always an easy experience using Gem select.

Posted By Jeff in November, 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

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

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

all good

Posted By John in December, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 10

Perfect size I was looking for and great price

Posted By Izzy in September, 2023

Source: Bizrate

Gemstones A-Z

Buy Round Shape 15 mm Gems

18.36 ct Carved Ruby-Zoisite, 16.8 x 14.5 mm From Tanzania

1.64 ct Oval Cut Andalusite, 5 x 3.1 mm From Brazil

55.11 ct Fancy Charoite, 34.5 x 31 mm From Russia

1.76 ct Oval Rutile Quartz, 8.3 x 6.3 mm From India

9.66 ct Oval Boulder Opal, 22.4 x 13.1 mm From Australia

0.44 ct Purple Spinel, 4.9 x 3.9 mm Oval Cut From Tanzania

5.49 ct Oval Tiger's Eye, 10.3 x 8.2 mm From Thailand

1.17 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 6.2 mm

4.68 carat Swiss Blue Topaz, Carved Leaf loose Topaz from Brazil, Natural Gem, 13.4 x 10.3 mm

27.2 ct Cushion Fossil Coral, 18.7 x 13.5 mm From Indonesia

9.07 ct Round Cut Smoky Quartz, 14 mm From Brazil

12.37 ct Flower Cut Smoky Quartz, 13.9 x 10.2 mm From Brazil

1.13 ct Pink Morganite, 7.2 mm Round Cut From Afghanistan

11.81 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 22.8 x 15.4 mm

3.13 ct Oval Prehnite, 8.9 x 8.1 mm From South Africa

0.91 ct Loose Yellow Citrine, 10.2 x 4.1 mm Oval Buff Top From Brazil

1.87 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.6 x 6.6 mm

23.21 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 18.7 x 15.5 mm

8.56 ct Cushion Tiger's Eye, 14 x 11.9 mm From Thailand

4.17 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12.1 x 5.9 mm

36.27 ct Pencil Cut Tiger's Eye, 32.8 mm From Thailand

1.34 ct Loose Multicolor Sapphire, 6.6 x 5.3 mm Cushion Cut From Madagascar

4.13 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 5.1 mm

0.52 carat Green Sapphire, Trillion-Cut loose Sapphire from Madagascar, Natural Gem, 5 x 4.8 mm

3.72 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gems, 8.2 mm

3.86 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 3.9 mm

1.32 ct Blue Apatite, 5.1 x 4.1 mm Oval Cut From Madagascar

2.39 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.1 mm

26.81 carat Purple Tourmaline, Carved Leaf loose Tourmaline from Mozambique, Natural Untreated Gems, 26.5 x 14.4 mm

1.92 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.8 x 5.9 mm

17.03 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 31.6 x 18.4 mm

0.4 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 4 mm

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