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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
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Untreated Gemstones Treatment

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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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26.20ct Multicolor Jasper, Oval, Opaque

26.20ct Multicolor Jasper, Oval, Opaque

31.2 x 21.1 mm

$ 43.06

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25.66ct Multicolor Jasper, Pear Shape, Opaque

25.66ct Multicolor Jasper, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 15.75

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1.93ct Green Prehnite, Oval, Transparent

1.93ct Green Prehnite, Oval, Transparent

7.9 x 7.4 mm

$ 12.46

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1.56ct Pink Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (517106)

1.56ct Pink Tourmaline, Emerald Cut, VVS

9.7 x 4.3 mm

$ 117.93

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17.98ctw Multicolor Jasper, Heart, Translucent

17.98ctw Multicolor Jasper, Heart, Translucent

22.1 x 14.7 mm

$ 19.70

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17.40ct Gray Hematite, Emerald Cut, Opaque

17.40ct Gray Hematite, Emerald Cut, Opaque

18.5 x 14.4 mm

$ 14.62

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0.92ct Yellow Color-Change Diaspore, Pear Shape, VS

0.92ct Yellow Color-Change Diaspore, Pear Shape, VS

8.6 x 5.7 mm

$ 49.04

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1.96ct Yellow Citrine, Round, VVS

1.96ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.66

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0.64ct Yellow Citrine, Heart, VVS-VS

0.64ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.10

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4.77ct Yellow Citrine, Oval, VVS-VS

4.77ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 38.01

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13.50ct Pink Aragonite, Pear Shape, Opaque

13.50ct Pink Aragonite, Pear Shape, Opaque

22.2 x 14.4 mm

$ 15.80

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2.54ct Pink Morganite, Oval, VS

2.54ct Pink Morganite, Oval, VS

10 x 7.5 mm

$ 139.14

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2.69ctw Orange Sunstone, Round, Transparent

2.69ctw Orange Sunstone, Round, Transparent

7 mm (calibrated)

$ 41.27

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8.49ctw White Topaz, Square, VVS-VS
Topaz Product Video (341514)

8.49ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 68.37

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2.42ctw Orange Hessonite Garnet, Emerald Cut, VS

2.42ctw Orange Hessonite Garnet, Emerald Cut, VS

5.3 x 5.3 mm

$ 47.73

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1.08ct Brown Color-Change Garnet, Oval, VVS-VS

1.08ct Brown Color-Change Garnet, Oval, VVS-VS

6.4 x 5.5 mm

$ 86.29

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1.35ct Green Tourmaline, Emerald Cut, VS

1.35ct Green Tourmaline, Emerald Cut, VS

9 x 4.7 mm

$ 67.23

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25.49ctw Multicolor Fossil Coral, Fancy, Opaque

25.49ctw Multicolor Fossil Coral, Fancy, Opaque

20.9 x 14.4 mm

$ 55.29

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12.93ct White Quartz, Emerald Cut, VVS

12.93ct White Quartz, Emerald Cut, VVS

15 x 15 mm (calibrated)

$ 42.50

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4.79ctw Green Prehnite, Oval, Transparent
Prehnite Product Video (375923)

4.79ctw Green Prehnite, Oval, Transparent

7.8 x 7.1 mm

$ 25.67

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0.70ct Green Kornerupine, Pear Shape, VVS

0.70ct Green Kornerupine, Pear Shape, VVS

7.3 x 4.9 mm

$ 59.63

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3.44ct Green Malachite, Oval, Opaque

3.44ct Green Malachite, Oval, Opaque

9.5 x 6.9 mm

$ 6.86

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0.32ct Orange Spessartite Garnet, Oval, VS

0.32ct Orange Spessartite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 9.56

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4.48ct Multicolor Fire Agate, Fancy, Opaque

4.48ct Multicolor Fire Agate, Fancy, Opaque

12.3 x 9.6 mm

$ 34.45

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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 -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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