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 |
0.18ct Deep Red Ruby, Round, VS-SI
3.4 mm
$ 71.52
0.86ct Medium Red Ruby, Pear Shape, VS
7 x 5 mm (calibrated)
$ 722.40
0.57ct Wine Red Ruby, Oval, VS-SI
6 x 4 mm (calibrated)
$ 307.80
0.75ct Dark Red Ruby, Round, VS-SI
5 mm (calibrated)
$ 290.57
0.33ct Deep Wine Red Ruby, Round, SI
4 mm (calibrated)
$ 142.37
0.36ct Dark Red Ruby, Round, SI
4 mm (calibrated)
$ 155.30
6.28ct Medium Dark-Purple Star Ruby, Oval, Opaque
10.2 x 8.7 mm
$ 349.42
1.17ct Jam Red Ruby, Marquise, SI
10 x 4.8 mm
$ 1,034.77
0.30ct Wine Red Ruby, Round, SI
3.8 mm
$ 99.33
1.03ct Deep Red Ruby, Oval, VS-SI
6.4 x 5.4 mm
$ 910.96
0.22ct Deep Reddish Pink Ruby, Round, VS
3.3 mm
$ 87.41
0.86ct Reddish Pink Ruby, Pear Shape, VS
7 x 5 mm (calibrated)
$ 722.40
6.13ctw Medium Dark-Purple Rubies, Fancy, Opaque
15.7 x 10.3 mm
$ 147.12
0.16ct Deep Wine Red Ruby, Round, VS-SI
3.5 mm (calibrated)
$ 63.58
0.59ct Medium Red Ruby, Round, VS-SI
5 mm (calibrated)
$ 133.60
0.09ct Deep Red Ruby, Square, VS
2.2 x 2.1 mm
$ 14.52
0.87ct Deep Crimson Ruby, Round, VS-SI
5 mm (calibrated)
$ 337.07
0.29ct Pinkish Red Ruby, Round, VS
4 mm (calibrated)
$ 115.22
15.62ct Pinkish Purple Star Ruby, Oval, Opaque
14.9 x 12.4 mm
$ 224.93
1.03ct Dark Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 910.96
0.34ct Deep Red Ruby, Round, SI
4 mm (calibrated)
$ 112.20
12.90ct Medium-Dark Purple Star Ruby, Oval, Opaque
15.4 x 12.8 mm
$ 204.34
1.31ct Medium Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 1,210.44
6.52ct Medium Purple Star Ruby, Pear Shape, Opaque
11.2 x 9.5 mm
$ 362.77
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 -> 10 
Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones
Overall Rating -> 10
Enjoyed shopping.
Overall Rating -> 9 
Very easy to navigate with a great selection.
Overall Rating -> 9
It was great!
Overall Rating -> 10
I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.
Overall Rating -> 9
I love wide range of stones. Always have my preference.
