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Untreated Gemstones

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

Untreated Gemstones Weight
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1.29ct Yellow Beryl, Oval, VVS-VS

1.29ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 25.70

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1.21ct Orange Sunstone, Round, Translucent

1.21ct Orange Sunstone, Round, Translucent

7 mm (calibrated)

$ 7.53

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4.44ctw Multicolor Spectrolite, Oval, Opaque

4.44ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.30

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13.17ct Violet Amethyst, Emerald Cut, VVS

13.17ct Violet Amethyst, Emerald Cut, VVS

18 x 13 mm (calibrated)

$ 91.82

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0.48ct Violet Amethyst, Marquise, VVS

0.48ct Violet Amethyst, Marquise, VVS

8 x 4 mm (calibrated)

$ 3.19

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0.71ct Multicolor Spectrolite, Oval, Opaque

0.71ct Multicolor Spectrolite, Oval, Opaque

8.3 x 4.2 mm

$ 3.34

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0.31ct Yellow Color-Change Diaspore, Trillion, VVS

0.31ct Yellow Color-Change Diaspore, Trillion, VVS

4.7 x 4.6 mm

$ 16.37

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4.16ct Yellow Citrine, Emerald Cut, VVS

4.16ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 29.00

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2.70ct Green Fluorite, Pear Shape, Transparent

2.70ct Green Fluorite, Pear Shape, Transparent

10.3 x 7.3 mm

$ 11.07

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14.11ct Turquoise Larimar, Oval, Opaque

14.11ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 168.48

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1.66ct Multicolor Labradorite, Marquise, Translucent

1.66ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.68

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5.06ct Multicolor Pietersite, Marquise, Opaque

5.06ct Multicolor Pietersite, Marquise, Opaque

22.6 x 8 mm

$ 16.63

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4.88ct Yellow Citrine, Oval, VVS

4.88ct Yellow Citrine, Oval, VVS

14 x 9 mm (calibrated)

$ 32.08

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1.58ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.58ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6.3 x 6.2 mm

$ 29.43

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9.60ctw Pink Strawberry Quartz, Oval, Translucent

9.60ctw Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 147.25

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27.43ctw Multicolor Fossil Coral, Oval, Opaque

27.43ctw Multicolor Fossil Coral, Oval, Opaque

22.6 x 11.8 mm

$ 45.09

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1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

6.6 x 6 mm

$ 74.10

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0.65ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.65ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.8 x 4.7 mm

$ 20.68

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1.85ct Purple Rhodolite Garnet, Cushion, VVS

1.85ct Purple Rhodolite Garnet, Cushion, VVS

8.5 x 5.9 mm

$ 64.49

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2.84ct Pink Strawberry Quartz, Oval, Transparent

2.84ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 19.80

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3.08ctw Yellow Citrine, Emerald Cut, VVS-VS

3.08ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 21.40

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1.52ct Green Tourmaline, Round, VS
Tourmaline Product Video (730428)

1.52ct Green Tourmaline, Round, VS

7 mm (calibrated)

$ 211.95

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1.12ct Green Chrome Diopside, Marquise, VS-SI

1.12ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 27.89

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5.85ct Violet Amethyst, Cushion, VVS

5.85ct Violet Amethyst, Cushion, VVS

15.2 x 9.1 mm

$ 34.96

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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 have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
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

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

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