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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
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1.49ctw Red Pyrope Garnet, Square, VS

1.49ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.42

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1.23ct Brown Cat'S Eye Scapolite, Oval, Translucent

1.23ct Brown Cat'S Eye Scapolite, Oval, Translucent

7 x 5.3 mm

$ 6.74

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3.28ct Multicolor Opal, Oval, Transparent

3.28ct Multicolor Opal, Oval, Transparent

13.2 x 9.7 mm

$ 81.67

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0.67ct Yellow Color-Change Diaspore, Oval, VS

0.67ct Yellow Color-Change Diaspore, Oval, VS

6.1 x 5 mm

$ 24.80

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111.36ct Violet Amethyst, Square, Opaque
Amethyst Product Video (753210)

111.36ct Violet Amethyst, Square, Opaque

28.7 x 28.3 mm

$ 92.43

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0.94ct Gray Tourmaline, Round, Transparent

0.94ct Gray Tourmaline, Round, Transparent

6 mm (calibrated)

$ 18.72

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2.30ct Orange Hessonite Garnet, Oval, VS

2.30ct Orange Hessonite Garnet, Oval, VS

9.1 x 7.5 mm

$ 38.99

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50.87ct Violet Amethyst, Oval, VS
Amethyst Product Video (638378)

50.87ct Violet Amethyst, Oval, VS

27.4 x 21.4 mm

$ 354.67

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48.33ct Multicolor Jasper, Baguette, Opaque

48.33ct Multicolor Jasper, Baguette, Opaque

28.2 x 20 mm

$ 23.84

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1.65ct Yellow Citrine, Emerald Cut, VVS

1.65ct Yellow Citrine, Emerald Cut, VVS

8.1 x 6.3 mm

$ 13.15

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1.22ct Pink Morganite, Oval, VVS-VS

1.22ct Pink Morganite, Oval, VVS-VS

8.4 x 6.3 mm

$ 53.47

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1.40ct Turquoise Grandidierite, Oval, Translucent

1.40ct Turquoise Grandidierite, Oval, Translucent

7.5 x 6.3 mm

$ 69.72

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4.61ctw Yellow Citrine, Oval, VS

4.61ctw Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 25.26

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0.96ct Orange Zircon, Oval, VVS-VS

0.96ct Orange Zircon, Oval, VVS-VS

5.9 x 4.9 mm

$ 14.34

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12.28ct Violet Amethyst, Cushion, VVS

12.28ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 97.85

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48.12ct Violet Charoite, Fancy, Opaque

48.12ct Violet Charoite, Fancy, Opaque

27.1 x 22 mm

$ 79.05

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1.24ct Blue Kyanite, Oval, SI

1.24ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 24.70

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6.69ctw Yellow Prehnite, Oval, Transparent

6.69ctw Yellow Prehnite, Oval, Transparent

7.2 x 6.6 mm

$ 51.30

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6.58ct Violet Amethyst, Pear Shape, Transparent

6.58ct Violet Amethyst, Pear Shape, Transparent

16 x 12 mm (calibrated)

$ 39.33

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0.78ct Orange Hessonite Garnet, Pear Shape, VS

0.78ct Orange Hessonite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 17.09

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4.47ct Pink Strawberry Quartz, Oval, Translucent

4.47ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 53.43

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0.84ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.84ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.3 x 4.5 mm

$ 43.89

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33.47ct Multicolor Psilomelane Dendrite, Oval, Opaque

33.47ct Multicolor Psilomelane Dendrite, Oval, Opaque

33.6 x 20 mm

$ 27.00

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10.28ct Pink Strawberry Quartz, Oval, Translucent

10.28ct Pink Strawberry Quartz, Oval, Translucent

15.2 x 12.6 mm

$ 78.84

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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

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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