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 |
0.90ct Pinkish Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 372.67
0.36ct Deep Red Ruby, Round, SI
3.8 mm
$ 120.96
0.79ct Medium Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 327.12
0.19ct Dark Red Ruby, Round, VS
3.5 mm (calibrated)
$ 75.49
14.04ctw Raspberry Red Rubies, Flower Cut, Opaque
18 x 13 mm (calibrated)
$ 336.96
2.10ct Medium Dark-Purple Ruby, Fancy, Opaque
9 x 6.4 mm
$ 50.40
0.94ct Medium Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 404.30
0.80ct Deep Red Ruby, Round, VS-SI
5.7 mm
$ 331.27
0.99ct Jam Red Ruby, Round, VS-SI
5.7 mm
$ 753.37
1.36ct Medium Red Ruby, Oval, VS-SI
6.4 x 5.6 mm
$ 1,093.48
0.21ct Pinkish Red Ruby, Round, VS
3.5 mm (calibrated)
$ 83.44
2.64ctw Deep Crimson Red Rubies, Round, VS-SI
3.5 mm (calibrated)
$ 484.04
13.87ct Medium-Dark Purple Star Ruby, Oval, Opaque
15.4 x 12.9 mm
$ 219.70
1.21ct Reddish Pink Ruby, Round, VS-SI
6 mm (calibrated)
$ 502.26
14.20ct Grayish Magenta Star Ruby, Oval, Opaque
15.8 x 13.3 mm
$ 224.93
16.49ct Medium-Light Purple Star Ruby, Oval, Opaque
15.8 x 13.6 mm
$ 261.20
0.21ct Pinkish Red Ruby, Round, SI
3.5 mm (calibrated)
$ 83.44
7.40ctw Magenta-Pink Star Ruby, Oval, Opaque
10.1 x 8.6 mm
$ 411.74
1.22ct Deep Red Ruby, Oval, SI
7 x 5.4 mm
$ 1,078.99
9.90ct Reddish Purple Star Ruby, Oval, Opaque
12.6 x 10.5 mm
$ 550.84
1.28ct Deep Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 1,132.07
4.58ct Medium Dark-Purple Ruby, Flower Cut, Opaque
11.7 x 9 mm
$ 109.92
0.96ct Pinkish Red Ruby, Pear Shape, VS-SI
7 x 5 mm (calibrated)
$ 949.08
1.01ct Deep Red Ruby, Marquise, SI
9.3 x 4.3 mm
$ 893.27
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 
No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!
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 -> 9 
I was looking for a small gift for a friend- the process is the same as every other time and was very simple, and she even got her gift early! On the downside, there's no way to easily keep track of multiple Shipping Addresses, so if I want to send a gift to Friend A and to Friend B, I have to overwrite everything and it's a fair bit clunky in that regard.
Overall Rating -> 8 
Excellent selection of stones -including ones I had never heard of before -nice site and fairly easy to use
Overall Rating -> 10
I love the products. I've bought them as gifts and people love my gifts
Overall Rating -> 9
I wish there were options for jewelry settings
