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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (5754): Tanzanian Sapphire Gems Sapphire, Star Sapphire, Color Change Sapphire Clear All
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ID: 4599711 pcs
thumb image of 0.9ct Oval Facet Green Sapphire (ID: 459971)
0.90 ct Sapphire
6 x 5.1 mm
$ 62.28
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ID: 3998992 pcs
thumb image of 1.3ct Pear Facet Yellow Golden Sapphire (ID: 399899)
1.30 ct Sapphire
6 x 4.9 mm
$ 34.70
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ID: 40901910 pcs
thumb image of 1.5ct Diamond-Cut Multicolor Sapphire (ID: 409019)
1.48 ct Sapphire
3.2 mm
$ 51.80
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ID: 4532371 pcs
thumb image of 0.7ct Round Facet Yellow Golden Sapphire (ID: 453237)
0.67 ct Sapphire
4.8 mm
$ 39.13
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ID: 4063894 pcs
thumb image of 2.4ct Heart Facet Yellow Golden Sapphire (ID: 406389)
2.41 ct Sapphire
4.8 x 4.7 mm
$ 56.13
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ID: 4532421 pcs
thumb image of 0.6ct Round Facet Yellow Golden Sapphire (ID: 453242)
0.64 ct Sapphire
5 mm
$ 37.38
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ID: 4449062 pcs
thumb image of 1.3ct Round Facet Yellow Golden Sapphire (ID: 444906)
1.32 ct Sapphire
4.8 mm
$ 66.30
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ID: 41795720 pcs
thumb image of 1.6ct Diamond-Cut Multicolor Sapphire (ID: 417957)
1.57 ct Sapphire
2.5 mm
$ 54.95
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ID: 4530201 pcs
thumb image of 0.6ct Round Facet Orange Sapphire (ID: 453020)
0.62 ct Sapphire
5.2 mm
$ 36.21
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ID: 3303856 pcs
thumb image of 1.6ct Octagon / Scissor Cut Multicolor Sapphire (ID: 330385)
1.59 ct Sapphire
4 x 3 mm
$ 55.65
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ID: 3669662 pcs
thumb image of 0.8ct Princess-Cut Light Yellow Sapphire (ID: 366966)
0.84 ct Sapphire
4 x 4 mm
$ 63.95
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ID: 37211313 pcs
thumb image of 4ct Octagon Facet Yellow Orange Sapphire (ID: 372113)
3.97 ct Sapphire
4.2 x 3.1 mm
$ 138.95
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ID: 2452011 pcs
thumb image of 0.2ct Baguette Facet Yellow Orange Sapphire (ID: 245201)
0.24 ct Sapphire
4 x 3 mm
$ 17.16
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ID: 4485621 pcs
thumb image of 1.2ct Pear Facet Pinkish Purple Sapphire (ID: 448562)
1.17 ct Sapphire
6.6 x 5.8 mm
$ 563.94
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ID: 4435602 pcs
thumb image of 1.5ct Round Facet Yellow Golden Sapphire (ID: 443560)
1.47 ct Sapphire
5 mm
$ 73.04
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ID: 40101720 pcs
thumb image of 3.8ct Marquise Facet Yellow Orange Sapphire (ID: 401017)
3.83 ct Sapphire
5 x 2.7 mm
$ 95.75
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ID: 4532851 pcs
thumb image of 1.5ct Oval Facet Yellow Orange Sapphire (ID: 453285)
1.52 ct Sapphire
7.8 x 5.9 mm
$ 221.97
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ID: 4435342 pcs
thumb image of 1.3ct Oval Facet Yellow Golden Sapphire (ID: 443534)
1.31 ct Sapphire
6.1 x 5.1 mm
$ 65.09
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ID: 4297832 pcs
thumb image of 0.8ct Marquise Facet Yellow Golden Sapphire (ID: 429783)
0.76 ct Sapphire
6.8 x 3.6 mm
$ 18.56
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ID: 2899181 pcs
thumb image of 0.5ct Oval Facet Violet Sapphire (ID: 289918)
0.52 ct Sapphire
5.9 x 4.1 mm
$ 72.50
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ID: 4462552 pcs
thumb image of 1.4ct Round Facet Yellow Orange Sapphire (ID: 446255)
1.38 ct Sapphire
5 mm
$ 68.94
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Tanzanian Sapphire Gems
Tanzanian sapphire gems have proven to be very popular as of recent times. Many of the sapphires from Tanzania entering the market are untreated gems which are getting rarer and pricier every year. Tanzania is best known for tanzanite and rare tsavorite garnet, but over recent years, Tanzania has become one of the most dominant sources for gem-quality sapphire. Some Tanzanian material often exhibits a color-change property, typically shifting from violet to blue. The main limitation with unheated Tanzanian sapphire gems is that they are usually available only in smaller sizes, but many new Tanzanian mining sources have revealed much larger stones, often weighing 1-2 carats or more.

The Songea region of Tanzania is also becoming one the most important sources for fine fancy colored sapphire, particularly due to high levels of magnesium. It is the magnesium which results in a wide range of fancy sapphire colors. Many of the Songea sapphires respond very well to beryllium heat enhancement, producing some stunning colors. In fact, Tanzanian Songea sapphire gems have become so popular recently, that dealers trade them under names such as 'sunset ruby', but technically, they are not rubies at all since the colors are obtained through heat treatment with beryllium. In order to be ruby, it should be naturally red. In addition to Songea region, the Tunduru area near bordering Mozambique, is also a very well-known source for its quality sapphire deposits. Although there are many active sapphire mining areas in Tanzania already, most mining is still on a small scale, which means there is still much to see from Tanzania in the upcoming years.
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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