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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Golden
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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 |
0.73ct Red Ruby, Round, VS-SI
5.3 mm
$ 177.84
9.59ct Red Star Ruby, Oval, Opaque
13 x 9 mm (calibrated)
$ 147.10
0.94ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 305.07
0.92ct Red Ruby, Oval, VS-SI
7 x 4.7 mm
$ 766.04
0.49ct Red Ruby, Round, SI
4 mm (calibrated)
$ 161.05
0.21ct Red Ruby, Round, VS
3.5 mm (calibrated)
$ 69.26
0.46ct Red Ruby, Oval, VS-SI
6 x 4 mm (calibrated)
$ 226.79
2.40ct Purple Ruby, Fancy, Opaque
14.4 x 8.4 mm
$ 47.81
14.31ct Purple Star Ruby, Oval, Opaque
14.6 x 12.3 mm
$ 156.78
1.11ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 851.28
15.06ct Purple Star Ruby, Oval, Opaque
16.1 x 11.3 mm
$ 312.50
0.75ct Red Ruby, Round, VS-SI
5 mm (calibrated)
$ 241.17
0.55ct Red Ruby, Oval, VS-SI
5.8 x 3.8 mm
$ 271.16
1.61ct Red Ruby, Marquise, VS-SI
10 x 4.9 mm
$ 1,234.74
1.90ct Red Ruby, Marquise, VS-SI
11.4 x 5.2 mm
$ 1,457.15
0.30ct Red Ruby, Round, SI
3.7 mm
$ 98.94
1.07ct Red Ruby, Oval, SI
6.3 x 5.2 mm
$ 785.45
3.09ctw Red Rubies, Round, VS-SI
3.7 mm
$ 479.52
1.03ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 756.10
0.25ct Red Ruby, Round, VS
3.8 mm
$ 98.16
10.56ct Purple Ruby, Fancy, Opaque
30.8 x 11.4 mm
$ 245.40
1.47ct Purple Ruby, Fancy, Opaque
8.4 x 6.5 mm
$ 29.28
3.53ct Red Star Ruby, Oval, Opaque
11.1 x 9.5 mm
$ 163.02
4.90ct Red Ruby, Flower Cut, Opaque
12.2 x 9.6 mm
$ 97.61
Why Buy Ruby Heat Only from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
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 -> 10 
All good
Overall Rating -> 10
selection was broad and the check out was quick. Great site
Overall Rating -> 10
Good, hope gem quality is good and genuine
Overall Rating -> 10
I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.
Overall Rating -> 10
I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.
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.
