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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
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.74ct Red Zircon, Oval, VS
Zircon Product Video (406734)

2.74ct Red Zircon, Oval, VS

9 x 7 mm (calibrated)

$ 140.23

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8.06ct Multicolor Agate, Oval, Opaque

8.06ct Multicolor Agate, Oval, Opaque

14 x 12.8 mm

$ 6.42

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29.30ct Gray Hematite, Baguette, Opaque

29.30ct Gray Hematite, Baguette, Opaque

21.1 x 14.6 mm

$ 16.05

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1.30ct Green Tourmaline, Emerald Cut, VS

1.30ct Green Tourmaline, Emerald Cut, VS

16.4 x 3.1 mm

$ 34.18

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34.22ct Multicolor Pietersite, Oval, Opaque

34.22ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 87.35

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4.50ct Pink Morganite, Oval, Transparent

4.50ct Pink Morganite, Oval, Transparent

13 x 9 mm (calibrated)

$ 49.30

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0.58ct Red Pyrope Garnet, Heart, VS

0.58ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 4.62

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15.13ct Multicolor Pietersite, Oval, Opaque

15.13ct Multicolor Pietersite, Oval, Opaque

32.1 x 14.7 mm

$ 45.21

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3.44ctw Yellow Citrine, Round, VVS

3.44ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 27.41

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1.73ct Green Prehnite, Round, Transparent

1.73ct Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 9.32

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3.82ctw Orange Citrine, Round, VS

3.82ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 31.71

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12.46ct Green Opal, Oval, Opaque

12.46ct Green Opal, Oval, Opaque

18 x 13.7 mm

$ 22.24

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2.30ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.30ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.1 x 6.3 mm

$ 37.95

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1.48ct Red Pyrope Garnet, Fancy, VS

1.48ct Red Pyrope Garnet, Fancy, VS

9.2 x 3.4 mm

$ 17.72

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2.14ctw Blue Kyanite, Oval, SI

2.14ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 53.29

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0.47ct Pink Tourmaline, Round, Transparent

0.47ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 18.72

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2.52ct Orange Hessonite Garnet, Oval, VS

2.52ct Orange Hessonite Garnet, Oval, VS

9.1 x 7.6 mm

$ 55.22

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0.19ctw Blue Iolite, Square, VS

0.19ctw Blue Iolite, Square, VS

2.7 x 2.5 mm

$ 16.27

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51.22ct Brown Tiger'S Eye, Oval, Opaque

51.22ct Brown Tiger'S Eye, Oval, Opaque

35.4 x 22.1 mm

$ 23.56

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2.06ct Orange Moonstone, Cushion, Translucent

2.06ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.10

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1.07ct Yellow Citrine, Square, VVS

1.07ct Yellow Citrine, Square, VVS

6 x 6 mm (calibrated)

$ 6.22

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0.91ctw Red Pyrope Garnet, Square, VS

0.91ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.98

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28.45ct Gray Hematite, Square, Opaque

28.45ct Gray Hematite, Square, Opaque

17.2 x 16.3 mm

$ 27.74

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20.07ct Violet Amethyst, Cushion, VVS

20.07ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 139.93

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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 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.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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