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 |
0.30ct Red Ruby, Round, VS
3.8 mm
$ 48.51
0.22ct Red Ruby, Round, VS
3.5 mm (calibrated)
$ 72.55
16.58ct Purple Star Ruby, Oval, Opaque
14.3 x 13 mm
$ 198.16
0.81ct Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 278.39
11.80ct Purple Star Ruby, Oval, Opaque
15 x 12.5 mm
$ 141.03
0.36ct Red Ruby, Round, SI
4 mm (calibrated)
$ 128.90
1.02ct Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 748.75
2.50ct Purple Star Ruby, Oval, Opaque
8.9 x 7.7 mm
$ 115.45
12.55ct Purple Star Ruby, Oval, Opaque
14 x 12 mm (calibrated)
$ 137.50
1.06ct Red Ruby, Marquise, SI
9.3 x 4.6 mm
$ 589.48
3.16ct Purple Ruby, Flower Cut, Opaque
12.6 x 7.4 mm
$ 62.95
0.18ct Red Ruby, Round, VS-SI
3.3 mm
$ 59.36
0.40ct Red Ruby, Round, VS-SI
4.4 mm
$ 82.56
1.02ct Red Ruby, Marquise, SI
8.8 x 5.1 mm
$ 748.75
0.49ct Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 146.21
12.90ct Purple Star Ruby, Oval, Opaque
15.4 x 12.8 mm
$ 169.60
0.28ct Red Ruby, Round, SI
4 mm (calibrated)
$ 78.09
0.36ct Red Ruby, Round, SI
3.7 mm
$ 100.40
0.60ct Red Ruby, Round, VS-SI
4.5 mm (calibrated)
$ 406.53
0.21ct Red Ruby, Round, SI
3.5 mm (calibrated)
$ 69.26
18.39ct Purple Ruby, Fancy, Opaque
32.7 x 20 mm
$ 427.34
18.38ct Purple Star Ruby, Oval, Opaque
16.2 x 13.3 mm
$ 241.65
0.20ct Red Ruby, Round, VS
3.5 mm (calibrated)
$ 65.95
0.21ct Red Ruby, Round, VS
3.5 mm (calibrated)
$ 69.26
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 -> 10 
The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.
Overall Rating -> 10
Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!
Overall Rating -> 10
Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!
Overall Rating -> 10
I am filling a small treasure chest and picked a nice amethyst.
Overall Rating -> 10
Good, hope gem quality is good and genuine
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.
