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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (8724): Heat Only Gemstones Clear All
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1 pc
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thumb image of 0.5ct Trillion Facet Deep Blue Sapphire (ID: 495466)
0.53 ct Sapphire
4.7 x 4.7 mm
$ 64.91
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2 pcs
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thumb image of 0.8ct Round Facet Pinkish Red Ruby (ID: 494950)
0.82 ctw Ruby
4.5 mm
$ 160.31
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1 pc
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thumb image of 1.2ct Oval Facet Violet Blue Tanzanite (ID: 423611)
1.18 ct Tanzanite
7.9 x 6 mm
$ 136.27
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2 pcs
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thumb image of 3.2ct Oval Facet Violet Blue Tanzanite (ID: 345724)
3.24 ctw Tanzanite
8.9 x 6.9 mm
$ 355.50
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8 pcs
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thumb image of 2.1ct Octagon Step Cut Multicolor Sapphire (ID: 463733)
2.08 ctw Sapphire
4.1 x 2.9 mm
$ 83.20
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2 pcs
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thumb image of 2.2ct Oval Facet White Zircon (ID: 438991)
2.16 ctw Zircon
7.1 x 5 mm
$ 11.71
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10 pcs
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thumb image of 1.4ct Diamond-Cut Pink Red Ruby (ID: 402149)
1.44 ctw Ruby
3 mm
$ 200.02
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6 pcs
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thumb image of 4.7ct Oval Facet Blue Zircon (ID: 371575)
4.69 ctw Zircon
6.1 x 4.1 mm
$ 64.68
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1 pc
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thumb image of 0.7ct Round Cabochon Greenish Blue Sapphire (ID: 495964)
0.67 ct Sapphire
4.5 mm
$ 13.40
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1 pc
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thumb image of 47.2ct Round Facet Yellow Orange Zircon (ID: 329310)
47.19 ct Zircon
19.3 mm
$ 7,550.00
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1 pc
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thumb image of 12ct Cushion-Cut Violet Blue Tanzanite (ID: 378197)
12.03 ct Tanzanite
13.1 x 12.8 mm
$ 6,123.75
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6 pcs
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thumb image of 2.1ct Round Cabochon Multicolor Sapphire (ID: 495749)
2.10 ctw Sapphire
3.9 mm
$ 42.00
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6 pcs
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thumb image of 1.2ct Pear Facet Violet Blue Tanzanite (ID: 413497)
1.16 ctw Tanzanite
5 x 3.1 mm
$ 40.60
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2 pcs
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thumb image of 1.5ct Oval Facet White Zircon (ID: 359991)
1.53 ctw Zircon
6.1 x 4.2 mm
$ 8.51
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3 pcs
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thumb image of 1.4ct Oval Cabochon Blue Apatite (ID: 469190)
1.37 ctw Apatite
5 x 4.3 mm
$ 25.70
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1 pc
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thumb image of 1.3ct Oval Facet Violet Blue Tanzanite (ID: 360451)
1.27 ct Tanzanite
8.3 x 5.9 mm
$ 152.40
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5 pcs
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thumb image of 2.7ct Pear Facet Violet Blue Tanzanite (ID: 454089)
2.70 ctw Tanzanite
6.8 x 4.8 mm
$ 94.50
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4 pcs
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thumb image of 2.2ct Diamond-Cut Blue Zircon (ID: 489894)
2.19 ctw Zircon
4.5 mm
$ 26.28
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1 pc
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thumb image of 1.8ct Octagon Step Cut Red Ruby (ID: 459798)
1.76 ct Ruby
8.2 x 4.5 mm
$ 3,479.59
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1 pc
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thumb image of 10.5ct Oval Facet Violet Blue Tanzanite (ID: 378198)
10.52 ct Tanzanite
16.4 x 11.6 mm
$ 5,260.50
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6 pcs
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thumb image of 1.2ct Pear Facet Violet Blue Tanzanite (ID: 413499)
1.18 ctw Tanzanite
5.1 x 3.1 mm
$ 41.30
Item in Stock
Heat Only Gemstones
Buy Untreated Gemstones, or routine heat only: Natural semi-precious gems that have no other enhancements other than routine heating, cutting and polishing. This means no chemicals, dyes, raditation or any other type of gemstone treatment process that many connoisseurs would consider the gemstone to be rendered as 'not natural' after such enhancements. In the case of sapphire and ruby, heating it considered routing -- and oiling for emerald -- are accepted by most of the gem trade as being perfectly fine as long as it's disclosed -- so these products shown on these pages will show only gemstones that have been routine heated (or completely untreated)!
Certified Customer Reviews
Overall Rating -> 10 star ratings
Happy about the experience of the store, a lot of stone urge very nice
Posted By Ginger22 in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Great products, reasonably priced, always a great shopping experience
Posted By Cas Brown in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
good all is very good
Posted By Arocas in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Ease of selection- guarantee- honesty
Posted By Curt in April, 2018
Source: Bizrate
Overall Rating -> 8 star ratings
when I need a colored stone I check gem select. a trusted supplier for at least 10 years for me. many of the online sites have gone black but gemselect continues to satisfy me. oh sure there are many windowed and poorly cut stones here so paying some attention is critical. remember these are not custom cut stones but rather cut by old methods and the aim is to keep weight up at the expense of optical perfection. remember that colored stones are about color as the first consideration. I just wish gemselect offered rough for those who want to cut it.
Posted By Bis in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Wow, great site with clear, concise information that is provided in a very user-friendly interface. I feel lucky to have found this given I am about ready to ask my dream girl to marry me. Thanks!
Posted By JJ in April, 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