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Buy Heat Only Gemstones

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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (8413): Heat Only Gemstones Clear All
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4 pcs
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Multicolor Sapphire Gem - 0.7ct Octagon Facet (ID: 444395)

Octagon / Emerald Cut Multicolor Sapphire

0.66 ct (total 2.62ctw)
6 x 4.1 mm
$ 315.87
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1 pc
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Green Sapphire Gem - 4.5ct Oval Facet (ID: 458367)

Oval Green Sapphire

4.5ct
10.8 x 9.1 mm
$ 2,485.65
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1 pc
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Golden Yellow Zircon Gem - 22.8ct Oval Facet (ID: 400696)

Oval Yellow Zircon

22.8ct
16.9 x 13.4 mm
$ 2,249.99
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1 pc
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Violet Blue Tanzanite Gem - 1.6ct Oval Facet (ID: 374290)

Oval Blue Tanzanite

1.6ct
8.4 x 6.6 mm
$ 196.25
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1 pc
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Blue Zircon Gem - 4.8ct Round Facet (ID: 459874)

Round Blue Zircon

4.8ct
8.3 mm
$ 580.80
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2 pcs
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Blue Sapphire Gem - 0.6ct Diamond-Cut (ID: 441511)

Round Blue Sapphire

0.62 ct (total 1.24ctw)
5.2 mm
$ 496.00
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1 pc
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Pink Red Ruby Gem - 1.1ct Oval Facet (ID: 402659)

Oval Red Ruby

1.1ct
7.1 x 5 mm
$ 798.00
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1 pc
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Light to Deep Blue Kyanite Gem - 4.6ct Oval Facet (ID: 488894)

Oval Blue Kyanite

4.6ct
11.2 x 9 mm
$ 254.36
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1 pc
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Blue Zircon Gem - 4.5ct Round Facet (ID: 459876)

Round Blue Zircon

4.5ct
8.3 mm
$ 542.40
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1 pc
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Click for Product Video (402262)
Pink Red Ruby Gem - 2.1ct Marquise Facet (ID: 402262)

Marquise Red Ruby

2.1ct
12.3 x 5.8 mm
$ 2,568.00
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360 pcs
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Blue Apatite Gem - 0.1ct Round Facet (ID: 503687)

1 pc (avg. 0.07 ct) Blue Apatite

2.5 mm
$ 1.58
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2 pcs
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White Zircon Gem - 1.9ct Round Facet (ID: 377893)

Round White Zircon

1.89 ct (total 3.77ctw)
6.5 mm
$ 101.26
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1 pc
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Bluish Green Kyanite Gem - 5.2ct Octagon Step Cut (ID: 488891)

Octagon / Emerald Cut Green Kyanite

5.2ct
9.3 x 9.2 mm
$ 363.30
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2 pcs
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Blue Sapphire Gem - 0.7ct Diamond-Cut (ID: 441553)

Round Blue Sapphire

0.68 ct (total 1.36ctw)
5.4 mm
$ 544.00
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5 pcs
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Violet Blue Tanzanite Gem - 0.5ct Oval Facet (ID: 446480)

Oval Blue Tanzanite

0.52 ct (total 2.62ctw)
6.1 x 4.1 mm
$ 196.50
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1 pc
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Blue Zircon Gem - 3.2ct Round Facet (ID: 447488)

Round Blue Zircon

3.2ct
7.9 mm
$ 312.84
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2 pcs
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White Zircon Gem - 1.7ct Diamond-Cut (ID: 405471)

Round White Zircon

1.65 ct (total 3.30ctw)
6.6 mm
$ 81.61
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1 pc
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Click for Product Video (458807)
Violet Blue Tanzanite Gem - 2.7ct Cushion-Cut (ID: 458807)

Cushion Blue Tanzanite

2.7ct
9.5 x 6.6 mm
$ 540.00
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1 pc
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Click for Product Video (499577)
Violet Blue Tanzanite Gem - 5ct Cushion-Cut (ID: 499577)

Cushion Blue Tanzanite

5ct
13.1 x 8.3 mm
$ 1,405.60
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4 pcs
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Multicolor Sapphire Gem - 0.7ct Octagon Facet (ID: 444391)

Octagon / Emerald Cut Multicolor Sapphire

0.67 ct (total 2.69ctw)
6.1 x 4 mm
$ 324.31
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245 pcs
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Deep Blue Sapphire Gem - 0.7ct Marquise Facet (ID: 505579)

1 pc (avg. 0.67 ct) Blue Sapphire

8.2 x 4.2 mm
$ 66.93
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)!
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As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
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Better than what I expected. Beautifully cut gem!
Posted By in January, 2019
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Overall Rating -> 10 star ratings
Gem select is the most trustworthy web site for gems. What I see in the picture is exactly what I get. Size is indicated by carat weight, and not the picture size, as they are trying to give an up close view of the gem I am hoping to buy. It was so easy to find the stones I was looking for at a price I could afford.
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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