Ruby Heat Only Gemstones
Browse certified ruby heat only gemstones with standard heat treatment and no glass filling or diffusion.
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Bi-color
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Black
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Blue
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Brown
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Gray
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Green
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Multicolor
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Orange
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Pink
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Purple Ruby Heat Only
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Red Ruby Heat Only
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Turquoise
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Violet
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White
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
1.23ct Red Ruby, Oval, SI
7 x 5 mm (calibrated)
$ 1,087.84
7.40ctw Purple Star Ruby, Oval, Opaque
10.1 x 8.6 mm
$ 411.74
15.62ct Purple Star Ruby, Oval, Opaque
14.9 x 12.4 mm
$ 224.93
0.95ct Red Ruby, Pear Shape, VS
7 x 5 mm (calibrated)
$ 798.00
9.87ct Purple Star Ruby, Oval, Opaque
11.4 x 10.5 mm
$ 549.17
5.73ct Red Ruby, Fancy, Opaque
19.6 x 12.9 mm
$ 137.52
8.14ct Purple Star Ruby, Oval, Opaque
12 x 10 mm (calibrated)
$ 452.91
9.44ct Purple Star Ruby, Oval, Opaque
13 x 11 mm (calibrated)
$ 149.53
0.73ctw Red Rubies, Round, VS-SI
4 mm (calibrated)
$ 245.28
10.31ct Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 163.31
0.32ct Red Ruby, Round, VS
3.8 mm
$ 127.15
12.54ct Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 198.64
0.43ct Red Ruby, Oval, VS
5 x 4 mm (calibrated)
$ 144.48
1.06ct Red Ruby, Marquise, VS-SI
8.7 x 4.5 mm
$ 1,093.22
0.76ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 297.17
1.10ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 972.86
0.43ct Red Ruby, Round, SI
4 mm (calibrated)
$ 170.28
9.79ct Purple Ruby, Fancy, Opaque
21.2 x 16.4 mm
$ 234.96
1.21ct Red Ruby, Oval, VS-SI
6.5 x 5.4 mm
$ 1,016.40
0.78ct Red Ruby, Pear Shape, VS
6.7 x 5 mm
$ 655.20
0.72ct Red Ruby, Round, VS-SI
5.3 mm
$ 555.53
1.00ct Red Ruby, Marquise, VS-SI
10.2 x 4.9 mm
$ 1,031.34
0.27ct Red Ruby, Round, SI-I1
3.7 mm
$ 107.28
18.38ct Purple Star Ruby, Oval, Opaque
16.2 x 13.3 mm
$ 291.14
Why Buy Ruby Heat Only from GemSelect?
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- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
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What Is Ruby Heat Only?
Ruby heat only gemstones are natural rubies that have undergone standard heat treatment to improve color and clarity, without any glass filling, beryllium diffusion, or chemical additives. Heat treatment is a widely accepted and permanent enhancement in the ruby trade.
Natural Heated Ruby - No Glass Filling
Our heat only ruby selection contains stones that are not fracture-filled and not diffusion treated. This makes them a preferred choice for buyers seeking traditional, untreated-appearance rubies with full treatment transparency.
Why Choose Heat Only Ruby?
Heat only ruby stones maintain the natural structure of corundum while improving vibrancy and reducing visible inclusions. Compared to heavily treated rubies, they offer stronger long-term value, better durability, and higher market acceptance.
Ruby Heat Treatment Explained
Standard heat treatment involves heating rubies at high temperatures to enhance color and clarity. No foreign materials are introduced, and the treatment is stable and permanent. This differs significantly from glass-filled or diffusion-treated rubies.
Heat Only Ruby for Jewelry
With a Mohs hardness of 9, ruby heat only gemstones are ideal for rings, earrings, pendants, and fine jewelry. Their durability and classic red color make them suitable for daily wear and heirloom designs.
Wholesale Ruby Heat Only Stones
GemSelect offers individual stones and wholesale ruby heat only options for jewelers and collectors. Choose from various shapes, sizes, calibrated stones, and matched pairs with worldwide shipping.
Learn more about ruby properties, treatments, and buying tips on our Ruby Information Page.
FAQs
What does ruby heat only mean?
Ruby heat only means the gemstone has undergone standard heat treatment to enhance color and clarity, with no glass filling, diffusion, or additional chemical treatments.
Is heat only ruby considered natural?
Yes. The ruby itself is 100% natural corundum. Heat treatment is an accepted industry practice and is considered a permanent enhancement when fully disclosed.
How is heat only ruby different from glass-filled ruby?
Glass-filled rubies contain foreign materials to fill fractures, while heat only rubies do not. Heat only stones maintain their natural structure and typically offer better durability and long-term value.
Are ruby heat only stones good for engagement rings?
Yes. With a hardness of 9 on the Mohs scale, heat only rubies are durable enough for engagement rings and everyday jewelry when properly set.
Does heat treatment affect ruby value?
Standard heat treatment is widely accepted in the trade. Heat only rubies generally hold significantly higher value than heavily treated or fracture-filled stones.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 8 
Good prices
Overall Rating -> 8
I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.
Overall Rating -> 10 
No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!
Overall Rating -> 10
The stones are very nice.
Overall Rating -> 10
The website was very easy to use.
Overall Rating -> 10
Very good place to buy gemstones
