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Buy Round Shape 3 mm Gems

(199)
Gem Type Weight Size Clarity Price Origin
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Light Navy Blue Sapphire Gem - 0.1ct Diamond-Cut (ID: 503403)

1 pc (avg. 0.14 ct) Blue Sapphire

3 mm
$ 14.23
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30 pcs
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Dark Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467877)

Round Red Almandine Garnet

0.19 ct (total 5.73ctw)
3.1 mm
$ 28.65
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20 pcs
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Dark Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467825)

Round Red Almandine Garnet

0.18 ct (total 3.61ctw)
3 mm
$ 18.05
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15 pcs
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Merlot Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467967)

Round Red Almandine Garnet

0.19 ct (total 2.86ctw)
3 mm
$ 14.30
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2 pcs
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Champagne Diamond Gem - 0.1ct Diamond-Cut (ID: 564562)

Round Golden Diamond

0.11 ct (total 0.21ctw)
3 mm
$ 349.92
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10 pcs
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Lime Green Peridot Gem - 0.1ct Round Facet (ID: 498541)

Round Green Peridot

0.13 ct (total 1.33ctw)
3.1 mm
$ 9.31
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20 pcs
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Deep Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467770)

Round Red Almandine Garnet

0.21 ct (total 4.19ctw)
3 mm
$ 20.95
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10 pcs
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Purple-Pink Sapphire Gem - 0.2ct Round Cabochon (ID: 495753)

Round Purple Sapphire

0.15 ct (total 1.53ctw)
2.9 mm
$ 82.62
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1 pc
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champagne Diamond Gem - 0.1ct Diamond-Cut (ID: 564619)

Round Golden Diamond

0.1ct
3.1 mm
$ 199.96
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20 pcs
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Dark Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467897)

Round Red Almandine Garnet

0.20 ct (total 4.02ctw)
3.1 mm
$ 20.10
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10 pcs
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Yellow Green Peridot Gem - 0.1ct Round Facet (ID: 498505)

Round Green Peridot

0.13 ct (total 1.31ctw)
3.1 mm
$ 9.17
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20 pcs
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Deep Wine Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467851)

Round Red Almandine Garnet

0.18 ct (total 3.54ctw)
3.1 mm
$ 17.70
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20 pcs
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Raspberry Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467866)

Round Red Almandine Garnet

0.20 ct (total 4.00ctw)
3 mm
$ 20.00
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20 pcs
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Very Light Royal Purple Pink Sapphire Gem - 0.2ct Round Cabochon (ID: 345431)

Round Pink Sapphire

0.19 ct (total 3.78ctw)
3.1 mm
$ 94.50
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20 pcs
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Dark Red Almandine Garnet Gem - 0.2ct Round Cabochon (ID: 467823)

Round Red Almandine Garnet

0.17 ct (total 3.33ctw)
3.1 mm
$ 16.65
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10 pcs
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Light Yellow Green Peridot Gem - 0.1ct Round Facet (ID: 498233)

Round Green Peridot

0.13 ct (total 1.32ctw)
3.1 mm
$ 9.24
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10 pcs
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Pale Lime Green Peridot Gem - 0.1ct Round Facet (ID: 498204)

Round Green Peridot

0.13 ct (total 1.34ctw)
3 mm
$ 9.38
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10 pcs
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Light Greenish Yellow Peridot Gem - 0.1ct Round Facet (ID: 498522)

Round Yellow Peridot

0.13 ct (total 1.34ctw)
3 mm
$ 9.38
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12 pcs
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Lime Green Peridot Gem - 0.1ct Round Facet (ID: 498556)

Round Green Peridot

0.13 ct (total 1.61ctw)
3.1 mm
$ 11.27
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74 pcs
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Bright Violet Sapphire Gem - 0.1ct Diamond-Cut (ID: 513163)

1 pc (avg. 0.13 ct) Violet Sapphire

3.1 mm
$ 6.47
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2 pcs
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Warm White Diamond Gem - 0.1ct Diamond-Cut (ID: 565128)

Round White Diamond

0.11 ct (total 0.21ctw)
3 mm
$ 348.25
Item in Stock
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Round Shape 3 mm Gems

How Does 'GemSelect' Sell Round 3 mm GemStones and How can They be Used?

GemSelect’s Round Shape 3mm gems are useful in many designs for small jewelry and convenient to purchase due to their calibrated size and our extensive selection. For design ideas we suggest; Fiore Stud earrings, Sapphire Drop earrings, Tower Style earrings, Stationed Bezel Set bracelets, Pave Set Pendants and Rings all to be crafted using this size gemstone. They're also great for a minimal pair of earrings like Studs and can accent a larger piece of jewelry too. In addition to all the 'new designs' one can create with our 3mm round stones they're also ideal for repairs and replacement. Our single stones, pairs, and lots in this size range from 2.9mm-3.1mm. GemSelects multicolored lots are available in Sapphire and Andalusite, and as always GemSelects colored lots are expertly color matched for customer convenience and satisfaction.

What are the Benefits of Purchasing 3 mm Round Calibrated Gems at GemSelect?

Our inventory of 3mm range calibrated stones includes a vast selection of Ruby, Sapphire, Peridot, Demantoid Garnet, Chrome Diopside, and Almandine Garnet. Ruby and Sapphire are available in both cabochon and faceted lots. Our variety of Cabochon and Faceted Precious and Semi-Precious Gemstones is sure to catch your eye and the eyes of your customers. The availability in the colors we offer to buy in this calibrated sizes includes; Blue, Green, Multicolor, Orange, Pink, Red, White, and Yellow Colored Gemstones.

Certified Customer Reviews
Overall Rating -> 10 star ratings
This purchase was very easy to complete. I have been buying items every once in a while from you for a few years now, and always love the simplicity of teaching and purchasing items. I will, of course, purchase from you again.
Posted By John in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
This site is great.
Posted By Con in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a vast selection of gemstones in various size, shape and price. I like it because the gems are precut and ready for the novice jewler. The website is very easy to navigate and purchasing was a breeze.
Posted By Mr. C in February, 2020
Source: Bizrate
Overall Rating -> 8 star ratings
It was super easy to find what i wanted and i loved how i can sort through the huge selection easily
Posted By Max in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
This is my second time purchasing from Gem Select. I love this vendor and the website Full of info and if there’s any problems or questions customer service has been stellar at Making the experience a great one.
Posted By Tmpbjur in February, 2020
Source: Bizrate
Overall Rating -> 8 star ratings
seems like a good place to purchase a gem
Posted By Jane in February, 2020
Source: Bizrate
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More Shapes
  • Asscher Cut
  • Baguette / Scissor Cut
  • Baguette Cabochon
  • Baguette Checkerboard
  • Baguette Crystal Cluster
  • Baguette Facet
  • Baguette Rose-Cut
  • Baguette Step Cut
  • Baguette Sugarloaf Cabochon
  • Baroque
  • Barrel
  • Barrel / Checkerboard
  • Barrel / Full-Round
  • Barrel / Scissor Cut
  • Barrel Cabochon
  • Barrel Rose Cut
  • Bear Carving with Hole
  • Bird Carving
  • Briolette
  • Briolette with Hole
  • Carved Baguette
  • Carved Cameo
  • Carved Cushion
  • Carved Elephant
  • Carved Fancy
  • Carved Fish
  • Carved Fish with Hole
  • Carved Flower
  • Carved Fruit
  • Carved Half Heart
  • Carved Half Moon
  • Carved Heart
  • Carved Heart Cabochon
  • Carved Leaf
  • Carved Marquise
  • Carved Marquise Cabochon
  • Carved Octagon
  • Carved Oval
  • Carved Oval Cabochon
  • Carved Owl
  • Carved Pear
  • Carved Pear Cabochon
  • Carved Rhomb
  • Carved Rose
  • Carved Rose with Half Drilled Hole
  • Carved Round
  • Carved Round Bar
  • Carved Round Cabochon
  • Carved Sheep
  • Carved Shell
  • Carved Square
  • Carved Teardrop
  • Carved Trillion
  • Carved Turtle
  • Cushion Buff-Top
  • Cushion Cabochon
  • Cushion Carved Medusa Cameo
  • Cushion Checkerboard
  • Cushion Checkerboard (double sided)
  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
  • Cushion Mixed Cut
  • Cushion Rose-Cut
  • Cushion Shape Sugarloaf Cabochon
  • Cushion Sugarloaf Cabochon
  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
  • Drilled Sphere
  • Drilled Square Rondelle Slice
  • Fancy Cabochon
  • Fancy Carved Cushion
  • Fancy Carved Oval
  • Fancy Carved Pear
  • Fancy Carved Round
  • Fancy Carved Trillion
  • Fancy Carving
  • Fancy Crystal Cluster
  • Fancy Facet
  • Fancy Fantasy Carved Leaf
  • Fancy Fantasy Carving
  • Fancy Slice
  • Fancy Star Facet
  • Fancy-Cut
  • Fantasy Carved Flower
  • Fantasy Carved Flower Cut
  • Fantasy Carved Leaf
  • Flower Carving
  • Flower-Cut
  • Half Heart Cabochon
  • Half Heart Facet
  • Half Moon Cabochon
  • Half Moon Facet-Cut
  • Half Moon Faceted
  • Half-Drilled Briolette
  • Half-Drilled Sphere
  • Heart Cabochon
  • Heart Checkerboard (double sided)
  • Heart Facet
  • Heart Rose-Cut
  • Hexagon Cut
  • Marquise Buff-Top
  • Marquise Cabochon
  • Marquise Checkerboard
  • Marquise Checkerboard (double sided)
  • Marquise Facet
  • Marquise Mixed Cut
  • Marquise Slice
  • Marquise Sugarloaf Cabochon
  • Octagon / Scissor Cut
  • Octagon Cabochon
  • Octagon Checkerboard
  • Octagon Facet
  • Octagon Step Cut
  • Oval Buff-Top
  • Oval Cabochon
  • Oval Cabochon with Hole
  • Oval Carved Cameo
  • Oval Checkerboard
  • Oval Checkerboard (double sided)
  • Oval Concave Cut
  • Oval Crystal Cluster
  • Oval Diamond-Cut
  • Oval Facet
  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
  • Oval Portuguese-Cut
  • Oval Rose-Cut
  • Oval Slice
  • Pear Cabochon
  • Pear Checkerboard
  • Pear Checkerboard with Hole
  • Pear Concave Cut
  • Pear Concave Fantasy Cut
  • Pear Crystal Cluster
  • Pear Double-Sided Checkerboard
  • Pear Facet
  • Pear Shape Sugarloaf Cabochon
  • Pear Slice
  • Pencil
  • Pencil Cut
  • Princess-Cut
  • Rhomb Cabochon
  • Rhomb Checkerboard
  • Rhomb Checkerboard (Double-Sided)
  • Rhomb Facet
  • Rondelle
  • Round Buff-Top
  • Round Cabochon
  • Round Checkerboard
  • Round Checkerboard (double sided)
  • Round Concave Cut
  • Round Concave Fantasy Cut
  • Round Drilled Checkerboard (Double Sided)
  • Round Drilled Rondelle
  • Round Facet
  • Round Mixed-Cut
  • Round Petal Cut
  • Round Portuguese-Cut
  • Round Rose-Cut
  • Round Rose-Cut (double sided)
  • Round Slice
  • Shark Fin Cabochon
  • Shield Cabochon
  • Spherical
  • Square / Scissor Cut
  • Square Cabochon
  • Square Facet
  • Square Rose-Cut
  • Square Step-Cut
  • Square Sugarloaf Cabochon
  • Square with Hole
  • Tapered Baguette
  • Tapered Baguette Cabochon
  • Teardrop Cabochon
  • Trapezoid
  • Trapezoid Cabochon
  • Trapezoid Checkerboard
  • Triangle
  • Triangle Cabochon
  • Trillion Cabochon
  • Trillion Checkerboard
  • Trillion Concave Cut
  • Trillion Concave Fantasy Cut
  • Trillion Crystal Cluster
  • Trillion Facet
  • Trillion Rose-Cut
  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
  • Sapphire
  • Emerald
  • Ruby
  • Aquamarine
  • Zircon
  • Opal
  • Topaz
  • Tourmaline
  • Garnet
  • Amethyst
  • Citrine
  • Tanzanite
All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
  • Agate
  • Agate Geode
  • Almandine Garnet
  • Amazonite
  • Amethyst
  • Ametrine
  • Ammolite
  • Andalusite
  • Andesine Labradorite
  • Apatite
  • Aquamarine
  • Aventurine
  • Beryl
  • Black Opal
  • Bloodstone
  • Boulder Opal
  • Calcite
  • Carnelian
  • Cat's Eye Apatite
  • Cat's Eye Aquamarine
  • Cat's Eye Augite
  • Cat's Eye Gemstones
  • Cat's Eye Moonstone
  • Cat's Eye Opal
  • Cat's Eye Scapolite
  • Chalcedony
  • Charoite
  • Chocolate Opal
  • Chrome Diopside
  • Chrome Tourmaline
  • Chrysoberyl
  • Chrysocolla
  • Chrysoprase
  • Citrine
  • Clinohumite
  • Color-Change Diaspore
  • Color-Change Fluorite
  • Color-Change Garnet
  • Color-Change Sapphire
  • Coral
  • Demantoid Garnet
  • Dendritic Agate
  • Diamond
  • Druzy Amethyst
  • Druzy Azurite
  • Emerald
  • Enstatite
  • Fire Agate
  • Fire Opal
  • Fluorite
  • Fossil Coral
  • Garnet
  • Golden Beryl
  • Grandidierite
  • Grossularite Garnet
  • Hawk's Eye
  • Hematite
  • Hemimorphite Druzy
  • Hessonite Garnet
  • Hiddenite
  • Howlite
  • Idocrase
  • Imperial Topaz
  • Iolite
  • Jade Gemstones
  • Jadeite
  • Jasper
  • Kornerupine
  • Kunzite
  • Kyanite
  • Labradorite
  • Lapis Lazuli
  • Larimar
  • Malachite
  • Malaya Garnet
  • Mali Garnet
  • Maw-Sit-Sit
  • Moonstone
  • Morganite
  • Moss Opal
  • Mother of Pearl
  • Mystic Quartz
  • Mystic Topaz
  • Nuummite
  • Obsidian
  • Opal
  • Opal Doublet
  • Opal in Matrix
  • Pearl
  • Peridot
  • Pietersite
  • Prehnite
  • Pyrite
  • Pyrope Garnet
  • Quartz
  • Quartz Cat's Eye
  • Quartz With Marcasite
  • Rainbow Moonstone
  • Rainbow Pyrite
  • Rhodochrosite
  • Rhodolite Garnet
  • Rose Quartz
  • Rubellite Tourmaline
  • Ruby
  • Ruby in Fuchsite
  • Ruby-Zoisite
  • Rutile Quartz
  • Sapphire
  • Scolecite
  • Seraphinite
  • Serpentine
  • Sillimanite
  • Sillimanite Cat's Eye
  • Smithsonite
  • Smoky Quartz
  • Snowflake Obsidian
  • Sodalite
  • Spectrolite
  • Spessartite Garnet
  • Sphalerite
  • Sphene
  • Spinel
  • Star Diopside
  • Star Garnet
  • Star Gemstones
  • Star Lemon Quartz
  • Star Moonstone
  • Star Rose Quartz
  • Star Ruby
  • Star Sapphire
  • Star Sunstone
  • Strawberry Quartz
  • Sugilite
  • Sunstone
  • Tanzanite
  • Tiger's Eye
  • Tiger's Eye Matrix
  • Topaz
  • Tourmaline
  • Tsavorite Garnet
  • Turquoise
  • Variscite
  • Zircon
Main Categories
  • New Arrivals
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  • Calibrated Gemstones
  • Gemstones By Piece
  • Top Grade Gems
  • Matching Pairs
  • Cabochon Gemstones
  • Drilled Gems, Briolettes and Beads
  • Birthstones
  • Gemstone Carvings
  • Fancy Gemstones
  • Star Gemstones
  • Unheated Sapphire
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International:
+66-39303404

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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart