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 |
1.10ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 807.47
0.85ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 243.46
0.31ct Red Ruby, Round, SI-I1
4 mm (calibrated)
$ 102.23
0.20ct Red Ruby, Round, VS
3.5 mm (calibrated)
$ 65.95
0.42ct Red Ruby, Oval, VS
5.2 x 4 mm
$ 117.13
1.13ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 648.85
0.30ct Red Ruby, Round, SI-I1
3.5 mm (calibrated)
$ 82.44
1.39ct Red Ruby, Pear Shape, VS-SI
7.2 x 6.2 mm
$ 1,066.02
4.07ct Purple Ruby, Fancy, Opaque
16 x 9.9 mm
$ 81.07
0.87ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 299.01
6.73ct Purple Ruby, Fancy, Opaque
19.1 x 12.1 mm
$ 134.06
0.79ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 415.81
15.91ct Purple Ruby, Fancy, Opaque
34.3 x 12.3 mm
$ 369.72
0.29ct Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 103.84
0.77ct Red Ruby, Round, VS-SI
5.3 mm
$ 264.65
0.80ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 505.30
0.67ct Purple Ruby, Round, VS-SI
5 mm (calibrated)
$ 209.34
2.37ct Purple Ruby, Fancy, Opaque
12.6 x 7.2 mm
$ 47.21
0.18ct Red Ruby, Round, SI-I1
3.5 mm (calibrated)
$ 59.36
11.27ct Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 148.16
13.22ct Purple Star Ruby, Oval, Opaque
14.9 x 12.6 mm
$ 173.80
0.17ct Red Ruby, Round, VS
3.4 mm
$ 56.07
1.08ct Red Ruby, Marquise, VS-SI
8.9 x 4.6 mm
$ 690.23
1.14ct Red Ruby, Marquise, VS-SI
9.4 x 4.1 mm
$ 794.81
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 -> 9 
I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.
Overall Rating -> 10 
Easy to use website
Overall Rating -> 10
Great prices!!! High quality gemstones.
Overall Rating -> 10
I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.
Overall Rating -> 10
Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.
Overall Rating -> 10
I loved it! Extensive inventory, great prices, I definitely will be buying from here again!
