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 |
1.02ct Dark Red Ruby, Oval, SI
7 x 5 mm (calibrated)
$ 902.11
4.64ct Medium Dark-Purple Ruby, Fancy, Opaque
14.4 x 11.4 mm
$ 111.36
0.73ct Deep Red Ruby, Round, VS-SI
5.5 mm (calibrated)
$ 555.53
21.97ct Grayish Magenta Star Ruby, Oval, Opaque
16.6 x 14.8 mm
$ 348.00
9.23ct Reddish Purple Star Ruby, Oval, Opaque
13 x 11 mm (calibrated)
$ 146.21
0.87ct Jam Red Ruby, Round, VS-SI
5.3 mm
$ 360.25
0.31ct Deep Wine Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 133.74
0.31ct Deep Red Ruby, Pear Shape, VS-SI
5.1 x 3.8 mm
$ 122.76
0.15ct Medium Dark-Red Ruby, Round, VS
3.5 mm (calibrated)
$ 59.60
0.30ct Deep Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 129.42
1.28ct Medium Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 1,075.20
0.29ct Deep Red Ruby, Round, VS
4 mm (calibrated)
$ 57.62
0.38ct Deep Red Ruby, Pear Shape, VS-SI
5 x 4 mm (calibrated)
$ 150.48
3.37ct Magenta-Pink Star Ruby, Oval, Opaque
7.6 x 7 mm
$ 187.51
1.05ct Medium Red Ruby, Oval, VS-SI
7 x 5 mm (calibrated)
$ 970.20
0.49ct Wine Red Ruby, Round, VS-SI
4 mm (calibrated)
$ 176.16
6.23ct Magenta Star Ruby, Oval, Opaque
12 x 10 mm (calibrated)
$ 346.64
1.52ctw Medium Red Rubies, Round, VS-SI
3.5 mm (calibrated)
$ 250.80
3.10ct Purple Red Ruby, Flower Cut, Opaque
10.8 x 8.3 mm
$ 74.40
12.90ct Medium-Dark Purple Star Ruby, Oval, Opaque
15.4 x 12.8 mm
$ 204.34
5.69ct Medium Dark-Purple Star Ruby, Oval, Opaque
12 x 10 mm (calibrated)
$ 316.59
0.41ct Deep Red Ruby, Oval, VS
5 x 4 mm (calibrated)
$ 137.76
13.63ct Medium Purple Star Ruby, Oval, Opaque
14.6 x 12 mm
$ 215.90
0.69ct Medium Red Ruby, Round, VS-SI
5 mm (calibrated)
$ 222.77
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 
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 -> 9 
The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.
Overall Rating -> 9
the gems were smaller than I thought but I was at fault for not reading the complete discrimination
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
Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways
Overall Rating -> 8 
Excellent selection of stones -including ones I had never heard of before -nice site and fairly easy to use
