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Buy Trillion Shape 12x12 mm Gems

(44)
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Yellow Golden Citrine Gem - 5.2ct Trillion Facet (ID: 498487)

Trillion Yellow Citrine

5.2ct
12.2 x 12 mm
$ 36.33
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Yellow Golden Citrine Gem - 4.6ct Trillion Facet (ID: 498474)

Trillion Yellow Citrine

4.6ct
12.1 x 11.9 mm
$ 32.27
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Yellow Golden Citrine Gem - 5.1ct Trillion Facet (ID: 501005)

Trillion Yellow Citrine

5.1ct
12.3 x 12.1 mm
$ 30.72
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Yellow Golden Citrine Gem - 6ct Trillion Facet (ID: 501306)

Trillion Yellow Citrine

6ct
12.1 x 12 mm
$ 36.24
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Yellow Golden Citrine Gem - 3.9ct Trillion Facet (ID: 450811)

Trillion Yellow Citrine

3.9ct
12.1 x 11.5 mm
$ 27.58
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Yellow Golden Citrine Gem - 4.8ct Trillion Facet (ID: 501203)

Trillion Yellow Citrine

4.8ct
12 x 11.9 mm
$ 28.68
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Yellow Golden Citrine Gem - 5.6ct Trillion Facet (ID: 501196)

Trillion Yellow Citrine

5.6ct
12.2 x 12.2 mm
$ 33.84
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Yellow Golden Citrine Gem - 4.7ct Trillion Facet (ID: 498560)

Trillion Yellow Citrine

4.7ct
12.1 x 12.1 mm
$ 33.04
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Yellow Golden Citrine Gem - 5ct Trillion Facet (ID: 501304)

Trillion Yellow Citrine

5ct
12 x 11.9 mm
$ 29.94
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Yellow Golden Citrine Gem - 5.2ct Trillion Facet (ID: 498466)

Trillion Yellow Citrine

5.2ct
12.1 x 11.9 mm
$ 36.19
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Yellow Golden Citrine Gem - 5.2ct Trillion Facet (ID: 498472)

Trillion Yellow Citrine

5.2ct
12.1 x 11.9 mm
$ 36.33
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Yellow Golden Citrine Gem - 5.3ct Trillion Facet (ID: 498498)

Trillion Yellow Citrine

5.3ct
12.1 x 11.9 mm
$ 36.96
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Yellow Golden Citrine Gem - 4.7ct Trillion Facet (ID: 498480)

Trillion Yellow Citrine

4.7ct
12.1 x 12.1 mm
$ 32.55
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Multicolor Fire Agate Gem - 5.3ct Trillion Cabochon (ID: 475488)

Trillion Multicolor Fire Agate

5.3ct
12 x 11.7 mm
$ 42.08
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Yellow Golden Citrine Gem - 5.4ct Trillion Facet (ID: 501307)

Trillion Yellow Citrine

5.4ct
12 x 11.9 mm
$ 32.46
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Yellow Golden Citrine Gem - 5.2ct Trillion Facet (ID: 501204)

Trillion Yellow Citrine

5.2ct
12.1 x 12 mm
$ 31.02
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Yellow Golden Citrine Gem - 5.5ct Trillion Facet (ID: 498492)

Trillion Yellow Citrine

5.5ct
12.2 x 12.1 mm
$ 38.36
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Yellow Golden Citrine Gem - 5.2ct Trillion Facet (ID: 498470)

Trillion Yellow Citrine

5.2ct
12.1 x 11.9 mm
$ 36.12
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Yellow Golden Citrine Gem - 6.1ct Trillion Facet (ID: 501194)

Trillion Yellow Citrine

6.1ct
12.1 x 12 mm
$ 36.78
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Yellow Golden Citrine Gem - 5.6ct Trillion Facet (ID: 498559)

Trillion Yellow Citrine

5.6ct
12.1 x 12.1 mm
$ 39.20
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Yellow Golden Citrine Gem - 5.8ct Trillion Facet (ID: 498493)

Trillion Yellow Citrine

5.8ct
12.1 x 12 mm
$ 40.81
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1 2
Trillion Shape 12x12 mm Gems
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 Trillion shapes, facet cut and cabochon gems available now in 12 mm x 12 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 meant nor 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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.

Certified Customer Reviews
Overall Rating -> 10 star ratings
man their gems are pretty good, and the prices aren't to bad either, I like checking out hte gems on there website, beceause the pictures of the gems are taken pretty well, and you can see the table, and the facets.
Posted By Spinach in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I love gemselect and I have bought a fair amount from them. The only complaint I have is not being able to save gems. I have a lot of projects so i am in the market for a lot of different gems and it's so disappointing to have to delete them all just to purchase one or two that I have saved in my cart.
Posted By S.Hicks in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I always check this site because they have unique options.
Posted By Lisa in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great website to navigate. Awesome Gem selection! Nice photos and discriptions for all of the gems for sale. You can find gems in all price ranges. Checkout was a breeze.
Posted By Timmy in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
They had an extensive gemstone selection in all different cuts, sizes, and colors. They also had very good and workable prices. All of these aspects pulled me in as a customer.
Posted By Josh in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
It all depend on the product I will receive and have it verified by my in law jewellers.
Posted By Vodka in February, 2019
Source: Bizrate
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939
More Shapes
  • Asscher Cut
  • Baguette / Scissor Cut
  • Baguette Cabochon
  • Baguette Carved Leaf
  • Baguette Checkerboard
  • Baguette Crystal Cluster
  • Baguette Facet
  • Baguette Rose-Cut
  • Baguette Step Cut
  • Baguette Sugarloaf Cabochon
  • Baroque
  • Barrel
  • Barrel / Checkerboard
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  • Carved Fancy
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  • Carved Flower
  • Carved Flower
  • Carved Fruit
  • Carved Half Heart
  • Carved Half Moon
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  • Carved Leaf
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  • Carved Octagon
  • Carved Oval
  • Carved Oval Cabochon
  • Carved Owl
  • Carved Pear
  • Carved Pear Cabochon
  • Carved Rabbit
  • 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 Cabochon
  • Cushion Cabochon
  • Cushion Carved Medusa Cameo
  • Cushion Checkerboard
  • 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
  • Drop / Pear
  • Fancy Cabochon
  • Fancy Carved Cushion
  • Fancy Carved Oval
  • Fancy Carved Pear
  • Fancy Carved Round
  • Fancy Carved Trillion
  • Fancy Carving
  • Fancy Crystal Cluster
  • Fancy Double-Sided Mixed Cut
  • Fancy Facet
  • 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
  • Fantasy Carved Round Buff-Top
  • Flat Crystal Matrix
  • Flower Carving
  • Flower-Cut
  • Half Heart Cabochon
  • Half Heart Facet
  • Half Moon Cabochon
  • Half Moon Facet-Cut
  • Half-Drilled Briolette
  • Half-Drilled Heart Checkerboard Facet
  • Half-Drilled Sphere
  • Heart Cabochon
  • Heart Checkerboard (double sided)
  • Heart Facet
  • Heart Rose-Cut
  • Hexagon Cut
  • Marquise Cabochon
  • Marquise Checkerboard
  • Marquise Checkerboard (double sided)
  • Marquise Crystal Cluster
  • Marquise Facet
  • 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 Concave Cut Disc
  • Oval Crystal Cluster
  • Oval Diamond-Cut
  • Oval Egg
  • Oval Facet
  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
  • Oval Portuguese-Cut
  • Oval Rose-Cut
  • Oval Slice
  • Oval Sugarloaf Cabochon
  • 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 Carved Cameo
  • Round Checkerboard
  • Round Checkerboard (double sided)
  • Round Checkerboard (Double-Sided)
  • Round Concave Cut
  • Round Concave Fantasy Cut
  • Round Domed-Bottom Rose Cut
  • Round Drilled Checkerboard (Double Sided)
  • Round Facet
  • Round Mixed-Cut
  • Round Petal Cut
  • Round Portuguese-Cut
  • Round Rose-Cut
  • Shark Fin Cabochon
  • Shark Fin Facet
  • Shield Cabochon
  • Shield Checkboard
  • 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
  • Tapered Cushion
  • Teardrop Cabochon
  • Trapezoid
  • Trapezoid Cabochon
  • Triangle
  • Triangle Cabochon
  • Trillion Cabochon
  • Trillion Checkerboard
  • Trillion Concave Fantasy Cut
  • Trillion Crystal Cluster
  • Trillion Facet
  • Trillion Rose-Cut
  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
  		•  Sapphire
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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
    A Back to Top
  		•  Actinolite Cat's Eye
  		• Agate
  		• Agate Geode
  		• Almandine Garnet
  		• Amazonite
  		• Amethyst
  		• Amethyst Geode
  		• Ametrine
  		• Ammolite
  		• Andalusite
  		• Andesine Labradorite
  		• Apatite
  		• Aquamarine
  		• Aventurine
    • B Back to Top
  		•  Beryl
  		• Black Opal
  		• Bloodstone
  		• Boulder Opal
    • C Back to Top
  		•  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
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  		• Chalcedony
  		• Charoite
  		• Chocolate Opal
  		• Chrome Diopside
  		• Chrome Tourmaline
  		• Chrysoberyl
  		• Chrysocolla
  		• Chrysoprase
  		• Citrine
  		• Citrine Geode
  		• Color-Change Diaspore
  		• Color-Change Fluorite
  		• Color-Change Garnet
  		• Color-Change Sapphire
  		• Coral
    • D Back to Top
  		•  Demantoid Garnet
  		• Dendritic Agate
  		• Diamond
  		• Druzy Azurite
    • E Back to Top
  		•  Emerald
  		• Enstatite
    • F Back to Top
  		•  Fire Agate
  		• Fire Opal
  		• Fluorite
  		• Fossil Coral
    • G Back to Top
  		•  Garnet
  		• Golden Beryl
  		• Grandidierite
  		• Grossularite Garnet
    • H Back to Top
  		•  Hawk's Eye
  		• Hematite
  		• Hemimorphite Druzy
  		• Hessonite Garnet
  		• Hiddenite
  		• Howlite
    • I Back to Top
  		•  Idocrase
  		• Imperial Topaz
  		• Iolite
    • J Back to Top
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  		• Jadeite
  		• Jasper
    • K Back to Top
  		•  Kornerupine
  		• Kunzite
  		• Kyanite
    • L Back to Top
  		•  Labradorite
  		• Lapis Lazuli
  		• Larimar
    • M Back to Top
  		•  Malachite
  		• Malaya Garnet
  		• Mali Garnet
  		• Maw-Sit-Sit
  		• Moonstone
  		• Morganite
  		• Moss Opal
  		• Mother of Pearl
  		• Mystic Quartz
  		• Mystic Topaz
    • N Back to Top
  		•  Nuummite
    • O Back to Top
  		•  Obsidian
  		• Opal
  		• Opal Doublet
  		• Opal in Matrix
    • P Back to Top
  		•  Pearl
  		• Peridot
  		• Pietersite
  		• Prehnite
  		• Pyrite
  		• Pyrope Garnet
    • Q Back to Top
  		•  Quartz
  		• Quartz Cat's Eye
  		• Quartz With Marcasite
    • R Back to Top
  		•  Rainbow Moonstone
  		• Rainbow Pyrite
  		• Rhodochrosite
  		• Rhodolite Garnet
  		• Rhodonite
  		• Rose Quartz
  		• Ruby
  		• Ruby in Fuchsite
  		• Ruby-Zoisite
  		• Rutile Quartz
    • S Back to Top
  		•  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
    • T Back to Top
  		•  Tanzanite
  		• Tiger's Eye
  		• Tiger's Eye Matrix
  		• Topaz
  		• Tourmaline
  		• Tsavorite Garnet
  		• Turquoise
    • V Back to Top
  		•  Variscite
    • Z Back to Top
  		•  Zircon
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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