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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (1312): Trillion Shaped Gems Clear All
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thumb image of 1.6ct Trillion Facet Violet Blue Tanzanite (ID: 424100)
1.63 ct Tanzanite
7.7 x 7.5 mm
$ 188.67
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thumb image of 19ct Trillion Cabochon Multicolor Sugilite (ID: 490045)
18.99 ct Sugilite
21.2 x 18.5 mm
$ 10.63
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10 pcs
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thumb image of 0.5ct Trillion Facet Pinkish Rose Rhodolite Garnet (ID: 424063)
0.45 ct (total 4.52ctw) Rhodolite Garnet
5.1 x 5.1 mm
$ 36.16
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thumb image of 6.1ct Trillion Cabochon Multicolor Ammolite (ID: 284804)
6.14 ct Ammolite
16.2 x 14.7 mm
$ 61.40
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6 pcs
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thumb image of 0.6ct Trillion Facet Pinkish Rose Rhodolite Garnet (ID: 423970)
0.56 ct (total 3.35ctw) Rhodolite Garnet
5.2 x 5.2 mm
$ 26.80
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thumb image of 7.2ct Trillion Facet Bi-Color Ametrine (ID: 483961)
7.20 ct Ametrine
14.8 x 12.6 mm
$ 43.20
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Click for Product Video (384341)
thumb image of 7.5ct Trillion Facet Violet Blue Tanzanite (ID: 384341)
7.47 ct Tanzanite
11.3 x 11.3 mm
$ 3,780.79
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4 pcs
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thumb image of 0.5ct Trillion Facet Swiss Blue Topaz (ID: 429732)
0.45 ct (total 1.81ctw) Topaz
5.3 x 5.1 mm
$ 9.05
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4 pcs
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thumb image of 0.7ct Trillion Facet Multicolor Sapphire (ID: 318609)
0.67 ct (total 2.67ctw) Sapphire
5.3 x 5.2 mm
$ 182.23
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4 pcs
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thumb image of 4.3ct Trillion Rose-Cut Black Spinel (ID: 267554)
4.25 ct (total 17.01ctw) Spinel
10.1 x 9.9 mm
$ 85.05
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thumb image of 5ct Trillion Shape Sugarloaf Cabochon Multicolor Green Malachite (ID: 493457)
4.95 ct Malachite
10 x 9.8 mm
$ 5.35
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6 pcs
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thumb image of 0.3ct Trillion Facet Red Pyrope Garnet (ID: 451668)
0.34 ct (total 2.03ctw) Pyrope Garnet
4 x 4.1 mm
$ 14.21
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thumb image of 34.2ct Trillion Cabochon Violet Sugilite (ID: 474566)
34.24 ct Sugilite
29.7 x 23.9 mm
$ 68.48
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thumb image of 5ct Trillion Shape Sugarloaf Cabochon Multicolor Green Malachite (ID: 493453)
4.98 ct Malachite
9.8 x 9.1 mm
$ 5.38
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2 pcs
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thumb image of 1ct Trillion Facet Violet Blue Tanzanite (ID: 421183)
0.95 ct (total 1.89ctw) Tanzanite
6.6 x 6.5 mm
$ 219.60
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Click for Product Video (400906)
thumb image of 6.8ct Trillion Facet Violet Blue Tanzanite (ID: 400906)
6.83 ct Tanzanite
11.9 x 11.3 mm
$ 3,441.50
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10 pcs
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thumb image of 0.5ct Trillion Facet Pinkish Rose Rhodolite Garnet (ID: 423347)
0.50 ct (total 5.01ctw) Rhodolite Garnet
5.2 x 5.1 mm
$ 40.08
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2 pcs
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thumb image of 3.7ct Trillion Cabochon Green Maw-Sit-Sit (ID: 493421)
3.73 ct (total 7.46ctw) Maw-Sit-Sit
13.8 x 9.3 mm
$ 15.89
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Click for Product Video (400907)
thumb image of 6.3ct Trillion Facet Violet Blue Tanzanite (ID: 400907)
6.30 ct Tanzanite
13.6 x 12.9 mm
$ 3,174.44
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thumb image of 2.4ct Trillion Facet Yellow Golden Sphalerite (ID: 466295)
2.40 ct Sphalerite
8.6 x 8.2 mm
$ 96.00
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10 pcs
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thumb image of 0.5ct Trillion Facet Pinkish Rose Rhodolite Garnet (ID: 424060)
0.49 ct (total 4.85ctw) Rhodolite Garnet
5.2 x 5.1 mm
$ 38.80
Item in Stock
Trillion Shaped Gems
When it comes to gemstones, shape and cut are are often used interchangeably. The reason is because the difference between the two isn't always obvious. Shape refers to the overall outline of a stone, while 'cut' refers the actual style, process or technique used to work the rough into finished gemstone pieces. Historically, a trilliant gem exhibits the basic trilliant design, featuring 43 facets cut into a triangular shape gemstone that has been worked into 1:1 ratio and cut with 43 facets. The 43 facets are based on the 'brilliant-cut' in order to maximize 'brilliance'. Like other brilliant cuts, the equilateral form of a well-cut trilliant gem should return a substantial degree of light and color to the eye. The trillion cutting style was originally introduced by the Asscher brothers (Asscher-cut) and was trademarked in 1962 by Henry Meyer Diamond Company of New York. Since the expiration of their 'trillion' patent, the term can be used to refer to all triangular shaped gems, even those which are not faceted.

Many trillions today are step-cut, scissor-cut, plain-cut, mixed-cut with undulating surfaces, and trillion gemstones are even cut en cabochon, featuring a flat bottom with a low or high dome depending on the type of gem. As long as the gemstone has a face-up outline or shape which resembles a triangle, then it can be described as a trillion-shaped gemstone. Gemstones like zircon, spinel, diamond, aquamarine, beryl and white sapphire are often cut as trillions to maximize brilliance, while darker gemstones such as tanzanite, spessartite garnet, rhodolite garnet and amethyst are given a trilliant cut in order to lighten and brighten color (rather than focusing on brilliance). Since most diamond-cut styles are modified for colored stones, many colored stone dealers use alternative terms that refer to shape rather than cut-style.
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Trustworthy company & site, great products.
Posted By KM in August, 2018
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Overall Rating -> 10 star ratings
I have been ordering from GemSelect for at least 6 years. Every single order was perfect - every item was as advertized, in perfect condition and arrived well within the specified time frame. I have recommended them to several friends.
Posted By Jim in August, 2018
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Overall Rating -> 10 star ratings
Excellent company with excellent website!
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Overall Rating -> 10 star ratings
Happy with price and ease of purchase. Will tell others
Posted By JJ Kool Juan in August, 2018
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Overall Rating -> 10 star ratings
Very pleased with my purchase in all aspects!!!!!
Posted By JJ Kool Juan in August, 2018
Source: Bizrate
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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