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 |
1.06ct Jam Red Ruby, Oval, SI
7 x 5 mm (calibrated)
$ 937.49
0.39ct Deep Red Ruby, Oval, VS
5.1 x 3.8 mm
$ 131.04
17.79ct Pinkish Purple Star Ruby, Oval, Opaque
15.1 x 12.2 mm
$ 281.80
1.03ct Light Red Ruby, Marquise, SI
9.8 x 4.5 mm
$ 910.96
0.32ct Dark Red Ruby, Round, VS
3.8 mm
$ 127.15
1.07ct Jam Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 988.68
4.95ct Reddish Purple Ruby, Fancy, Opaque
15.5 x 11 mm
$ 118.80
0.94ct Medium Red Ruby, Marquise, VS-SI
8.9 x 4.3 mm
$ 917.36
2.61ct Reddish Purple Ruby, Fancy, Opaque
14 x 9 mm (calibrated)
$ 62.64
14.31ct Medium-Dark Reddish Purple Star Ruby, Oval, Opaque
14.6 x 12.3 mm
$ 188.89
6.02ct Dark Red Star Ruby, Round, Opaque
9.5 mm (calibrated)
$ 334.95
0.22ct Deep Wine Red Ruby, Round, VS
4 mm (calibrated)
$ 104.05
0.31ct Deep Wine Red Ruby, Round, VS-SI
4.2 mm
$ 133.74
0.18ct Deep Reddish Pink Ruby, Round, VS
3.5 mm (calibrated)
$ 71.52
0.16ct Deep Wine Red Ruby, Round, VS
3.5 mm (calibrated)
$ 63.58
1.47ct Raspberry Red Ruby, Fancy, Opaque
8.4 x 6.5 mm
$ 35.28
1.37ct Medium Dark-Red Ruby, Cushion, VS-SI
7.6 x 5.3 mm
$ 342.50
0.38ct Currant Red Ruby, Pear Shape, VS-SI
5 x 4 mm (calibrated)
$ 150.48
0.91ct Deep Crimson Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 376.82
0.97ct Pinkish Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 379.27
0.26ct Medium Red Ruby, Round, VS-SI
3.5 mm (calibrated)
$ 61.82
13.22ct Pinkish Purple Star Ruby, Oval, Opaque
14.9 x 12.6 mm
$ 209.40
0.23ct Jam Red Ruby, Round, VS
3.5 mm (calibrated)
$ 91.39
20.08ct Plum Purple Star Ruby, Oval, Opaque
16.9 x 14.5 mm
$ 318.07
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
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I love the gems and your website, every time I want to buy I usually spend between 6 and 8 hours on your website.
Overall Rating -> 10
Filters need to be improved but rest of website is great
Overall Rating -> 10
Easy to use. No issues. Large selection of gems.
Overall Rating -> 7 
Okay thank you.
Overall Rating -> 10
love the site, the experience and the products.
Overall Rating -> 10
I love the products. I've bought them as gifts and people love my gifts
