Calibrated 5 mm Natural Loose Gemstones in all shapes: GemSelect

Buy gems by size in millimeters. Some people by gems by color or prize, 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 sizes and shapes, facet cut and cabochon gems available now in the 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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Gemstones A-Z

Buy 5 mm Gemstones

1.1 ct Cushion Cut Peridot, 8.1 x 5.9 mm From China

1.32 carat Sky Blue Topaz, Trillion loose Topaz from Brazil, Natural Gem, 7 x 7 mm

0.83 carat Green Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 14.6 x 2.6 mm

11.47 ct Oval Star Ruby, 12.5 x 11.3 mm From Madagascar

1.01 ct Oval Cut Peridot, 7 x 5 mm From China

0.43 carat Green Sapphire, Round loose Sapphire from Tanzania, Natural Gem, 4.3 mm

2.47 ct Orange Sunstone, 5.9 x 4.2 mm Oval Cut From Russia

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

1.11 ct Loose Orange Sapphire, 4.9 mm Round Cut From Tanzania

0.37 ct Loose Purple Sapphire, 5.2 x 2.7 mm Marquise Cut From Tanzania

1.12 ct Octagon Cut Color-Change Diaspore, 8.1 x 4.3 mm From Turkey

20.56 ct Oval Rose Cut Onyx, 24 x 17.4 mm From Sri Lanka

2.01 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 7.2 x 7.1 mm

31.24 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 23.6 x 19.2 mm

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

26.94 carat Green Aventurine, Pear loose Aventurine from Brazil, Natural Untreated Gem, 32.7 x 17.6 mm

0.82 ct Oval Cut Peridot, 7.1 x 5 mm From China

1.42 carat Trillion Mystic Quartz, loose Certified Mystic Quartz from Brazil, Natural Gems, 6.1 x 6 mm

3.72 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 13 x 9.8 mm

1.28 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.2 x 5.1 mm

2.01 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.7 x 3.7 mm

16.82 ct Round Pietersite, 18.6 mm From Namibia

2.63 ct Round Cut Strawberry Quartz, 9.2 mm From Russia

2.05 ct Yellow Beryl, 8.1 x 6 mm Oval Cut From Madagascar

3.62 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10.1 x 8.2 mm

1.49 carat Orange Hessonite Garnet, Baguette Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 5.2 mm

2.88 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 8.3 x 6.4 mm

21.4 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 32 x 14.5 mm

10.25 ct Oval Tiger's Eye, 18.2 x 13.4 mm From India

0.62 ct Pink Spinel, 6.5 x 4.5 mm Cushion Cut From Tanzania

75.91 ct Carved Smoky Quartz, 37.6 x 25.6 mm From Brazil

0.51 carat Blue Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 4.4 mm

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