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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.54ct Red Spinel, Heart, VS

0.54ct Red Spinel, Heart, VS

5.7 x 5.1 mm

$ 64.80

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2.65ct Violet Amethyst, Trillion, VS

2.65ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 17.42

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33.30ct Violet Amethyst, Oval, IF
Amethyst Product Video (508966)

33.30ct Violet Amethyst, Oval, IF

23.4 x 16.1 mm

$ 255.38

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32.76ctw Multicolor Fossil Coral, Cushion, Opaque

32.76ctw Multicolor Fossil Coral, Cushion, Opaque

20.9 x 14.5 mm

$ 37.33

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1.59ct Orange Hessonite Garnet, Oval, VVS-VS

1.59ct Orange Hessonite Garnet, Oval, VVS-VS

7.8 x 6.4 mm

$ 31.67

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0.90ct Orange Hessonite Garnet, Emerald Cut, VVS

0.90ct Orange Hessonite Garnet, Emerald Cut, VVS

6.3 x 4.6 mm

$ 13.39

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0.22ctw Brown Diamond, Round, VVS-VS
Diamond Product Video (564569)

0.22ctw Brown Diamond, Round, VVS-VS

3.1 mm

$ 401.64

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3.50ct Pink Rose Quartz, Emerald Cut, Transparent

3.50ct Pink Rose Quartz, Emerald Cut, Transparent

9.6 x 9.5 mm

$ 19.17

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1.08ct Multicolor Opal, Oval, Transparent
Opal Product Video (548051)

1.08ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 268.92

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33.61ct Multicolor Jasper, Oval, Translucent

33.61ct Multicolor Jasper, Oval, Translucent

32.6 x 23.2 mm

$ 44.56

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14.85ctw Black Spinel, Round, Opaque

14.85ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 48.81

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38.66ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447347)

38.66ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 63.54

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16.10ct Red Ruby-Zoisite, Flower Cut, Opaque

16.10ct Red Ruby-Zoisite, Flower Cut, Opaque

21.1 x 15.6 mm

$ 19.23

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12.60ctw Green Seraphinite, Pear Shape, Opaque

12.60ctw Green Seraphinite, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 20.71

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22.92ct Multicolor Cinnabar, Round, Opaque

22.92ct Multicolor Cinnabar, Round, Opaque

24.6 mm

$ 26.83

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0.80ct Green Peridot, Oval, VS

0.80ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.16

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7.25ct Multicolor Ruby In Fuchsite, Marquise, Translucent

7.25ct Multicolor Ruby In Fuchsite, Marquise, Translucent

25.1 x 12.8 mm

$ 54.25

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0.66ct Green Sphene, Oval, SI

0.66ct Green Sphene, Oval, SI

5.9 x 4.6 mm

$ 28.93

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5.60ct White Topaz, Oval, VVS

5.60ct White Topaz, Oval, VVS

12 x 10 mm (calibrated)

$ 37.18

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7.48ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439477)

7.48ct Blue Hemimorphite Druzy, Fancy, Opaque

17.1 x 9.1 mm

$ 122.92

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0.63ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.63ct Yellow Color-Change Diaspore, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 23.87

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1.67ct Brown Axinite, Oval, SI

1.67ct Brown Axinite, Oval, SI

9 x 7 mm (calibrated)

$ 48.90

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3.35ctw Multicolor Opal, Square, Transparent

3.35ctw Multicolor Opal, Square, Transparent

4 x 4 mm (calibrated)

$ 23.79

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15.85ctw Yellow Citrine, Emerald Cut, VVS
Citrine Product Video (500693)

15.85ctw Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 84.94

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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!

Posted By Orphanboy in December, 2025
Source: Bizrate
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