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 |
0.54ct Red Ruby, Round, VS-SI
5.2 mm
$ 185.60
23.57ct Purple Ruby, Oval, Opaque
30.4 x 19.7 mm
$ 547.71
0.43ct Red Ruby, Round, SI
4 mm (calibrated)
$ 141.33
1.03ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 756.10
24.49ct Purple Star Ruby, Oval, Opaque
16.5 x 15 mm
$ 321.97
0.28ct Red Ruby, Round, SI-I1
3.7 mm
$ 92.34
1.04ct Red Ruby, Pear Shape, VS-SI
7 x 5 mm (calibrated)
$ 763.43
0.42ct Red Ruby, Pear Shape, VS-SI
5.2 x 4 mm
$ 138.05
3.05ct Purple Ruby, Fancy, Opaque
13.7 x 9.6 mm
$ 60.76
1.12ct Red Ruby, Oval, SI
7 x 5 mm (calibrated)
$ 822.16
15.14ct Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 199.05
1.22ct Red Ruby, Oval, SI
6.5 x 5.5 mm
$ 895.56
3.21ct Purple Star Ruby, Oval, Opaque
8.2 x 6.6 mm
$ 148.24
2.50ct Purple Star Ruby, Oval, Opaque
8.9 x 7.7 mm
$ 115.45
0.38ct Red Ruby, Oval, VS
5 x 3.8 mm
$ 105.97
1.07ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 683.84
4.58ct Purple Ruby, Flower Cut, Opaque
11.7 x 9 mm
$ 91.23
1.66ct Purple Ruby, Fancy, Opaque
11.5 x 8.1 mm
$ 33.07
0.85ct Red Ruby, Round, VS-SI
5.3 mm
$ 273.34
0.63ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 397.92
0.33ct Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 129.56
0.49ct Red Ruby, Oval, VS-SI
6 x 4 mm (calibrated)
$ 241.58
0.40ct Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 143.22
3.19ct Purple Ruby, Fancy, Opaque
13.7 x 9.5 mm
$ 63.54
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 
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 10
This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.
Overall Rating -> 7 
Could not get it to work 25 times.
Overall Rating -> 10
Over pretty well experience the your website no complaints about it very easy reliable service provided
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
Easy to use website
