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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
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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20.54ct White Howlite, Fancy, Opaque

20.54ct White Howlite, Fancy, Opaque

24.2 x 19.1 mm

$ 9.82

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0.49ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.49ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.3 x 3.7 mm

$ 81.34

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58.74ct Multicolor Jasper, Baguette, Opaque

58.74ct Multicolor Jasper, Baguette, Opaque

37.4 x 18.8 mm

$ 58.51

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4.01ct Pink Strawberry Quartz, Oval, Translucent

4.01ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 30.76

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1.77ctw Yellow Morganite, Pear Shape, VS

1.77ctw Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 96.96

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2.18ct Yellow Citrine, Trillion, VVS-VS

2.18ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.80

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2.98ct Yellow Citrine, Oval, VVS

2.98ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 16.33

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37.79ct Multicolor Jasper, Cushion, Opaque

37.79ct Multicolor Jasper, Cushion, Opaque

30 x 22 mm (calibrated)

$ 26.09

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17.57ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.57ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.1 x 16 mm

$ 21.36

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22.97ctw Brown Tiger'S Eye, Pear Shape, Opaque

22.97ctw Brown Tiger'S Eye, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 30.20

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3.02ct Yellow Citrine, Square, VVS-VS

3.02ct Yellow Citrine, Square, VVS-VS

9 x 9 mm (calibrated)

$ 16.54

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0.68ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.68ct Yellow Color-Change Diaspore, Cushion, VVS-VS

5.3 x 4.6 mm

$ 35.90

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1.40ct White Opal, Oval, Transparent

1.40ct White Opal, Oval, Transparent

9.3 x 6.7 mm

$ 35.21

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2.86ctw White Topaz, Cushion, VVS-VS

2.86ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 15.67

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7.90ct Brown Star Moonstone, Oval, Translucent

7.90ct Brown Star Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 34.62

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15.04ct Multicolor Agate, Oval, Opaque

15.04ct Multicolor Agate, Oval, Opaque

15.1 x 14 mm

$ 14.98

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5.71ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

5.71ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

14.9 x 7.6 mm

$ 42.10

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2.43ct Green Tourmaline, Fancy, Translucent
Tourmaline Product Video (474710)

2.43ct Green Tourmaline, Fancy, Translucent

11.4 x 7.1 mm

$ 26.63

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14.32ct Blue Aquamarine, Oval, Translucent

14.32ct Blue Aquamarine, Oval, Translucent

18 x 13 mm (calibrated)

$ 297.14

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1.73ctw Green Demantoid Garnet, Oval, VS

1.73ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.6 mm

$ 189.54

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0.41ct Yellow Citrine, Heart, VVS

0.41ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.27

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9.95ctw Black Spinel, Round, Opaque

9.95ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 38.15

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2.20ct Green Peridot, Cushion, VS

2.20ct Green Peridot, Cushion, VS

8.5 x 7.6 mm

$ 83.17

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1.87ct Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (383658)

1.87ct Purple Rhodolite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 86.95

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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 -> 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 -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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