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 |
4.26ct Medium Dark Reddish-Purple Star Ruby, Oval, Opaque
10.7 x 8 mm
$ 237.03
4.63ct Reddish Purple Ruby, Fancy, Opaque
21.4 x 13.5 mm
$ 111.12
9.53ct Plum Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 150.96
0.19ct Deep Reddish Pink Ruby, Round, VS
3.5 mm (calibrated)
$ 75.49
0.31ct Medium Red Ruby, Round, SI
4 mm (calibrated)
$ 123.17
0.37ct Wine Red Ruby, Round, SI
3.7 mm
$ 124.32
0.32ct Deep Red Ruby, Baguette, VS-SI
5 x 2.7 mm
$ 59.53
0.19ct Pinkish Red Ruby, Round, VS
3.5 mm (calibrated)
$ 75.49
0.66ct Medium Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 248.45
0.17ct Deep Reddish Pink Ruby, Round, VS
3.5 mm (calibrated)
$ 67.55
0.39ct Wine Red Ruby, Oval, VS-SI
6 x 4 mm (calibrated)
$ 231.66
0.29ct Jam Red Ruby, Round, SI-I1
3.7 mm
$ 115.22
11.57ctw Medium Dark-Purple Rubies, Flower Cut, Opaque
14.3 x 10 mm
$ 277.68
1.06ct Jam Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 937.49
1.03ct Deep Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 910.96
1.02ct Dark Red Ruby, Oval, SI
7 x 5 mm (calibrated)
$ 902.11
0.71ct Reddish Pink Ruby, Round, VS-SI
5.3 mm
$ 262.42
1.52ctw Medium Red Rubies, Round, VS-SI
3.5 mm (calibrated)
$ 250.80
0.31ct Wine Red Ruby, Pear Shape, VS-SI
5.1 x 3.8 mm
$ 111.60
0.26ct Deep Crimson Ruby, Round, SI-I1
3.7 mm
$ 103.31
0.60ct Wine Red Ruby, Oval, VS-SI
6 x 4 mm (calibrated)
$ 238.52
0.84ct Light Red Ruby, Pear Shape, VS-SI
7.1 x 6 mm
$ 683.14
5.06ct Raspberry Red Star Ruby, Oval, Opaque
12.2 x 9.2 mm
$ 126.50
0.30ct Wine Red Ruby, Round, SI
4 mm (calibrated)
$ 100.80
Why Buy Ruby Heat Only from GemSelect?
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- Supplying natural gemstones to jewelers and collectors in 120+ countries
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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 
I love the quality, package and info of your gems.
Overall Rating -> 10
The website has a good selection, the interface is very intuitive.
Overall Rating -> 10
easy site to navigate
Overall Rating -> 10
All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.
Overall Rating -> 8 
It was a good interaction I got a good gemstone for cheap
Overall Rating -> 10
Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.
