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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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4.53ct Red Rhodolite Garnet, Oval, VVS

4.53ct Red Rhodolite Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 188.00

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28.77ctw Multicolor Jasper, Fancy, Opaque

28.77ctw Multicolor Jasper, Fancy, Opaque

28.9 x 14.5 mm

$ 40.35

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2.97ct Yellow Apatite, Pear Shape, VS-SI

2.97ct Yellow Apatite, Pear Shape, VS-SI

13 x 8.5 mm

$ 81.36

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3.98ctw Red Almandine Garnet, Oval, VVS-VS

3.98ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 148.65

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26.52ct Yellow Obsidian, Oval, Opaque

26.52ct Yellow Obsidian, Oval, Opaque

30 x 20.9 mm

$ 29.05

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2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 21.65

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1.09ct Blue Kyanite, Oval, VS-SI

1.09ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 23.89

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1.47ct Green Tourmaline, Oval, VVS-VS

1.47ct Green Tourmaline, Oval, VVS-VS

6.5 x 5.9 mm

$ 170.81

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2.06ctw Red Rhodolite Garnet, Square, VS

2.06ctw Red Rhodolite Garnet, Square, VS

4.7 x 4.6 mm

$ 18.04

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1.76ct Yellow Sphene, Oval, Transparent

1.76ct Yellow Sphene, Oval, Transparent

8 x 6 mm (calibrated)

$ 8.76

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15.28ct Turquoise Larimar, Oval, Opaque

15.28ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 182.43

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10.11ct Multicolor Fire Agate, Fancy, Opaque

10.11ct Multicolor Fire Agate, Fancy, Opaque

18.1 x 11.2 mm

$ 75.99

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11.00ctw Multicolor Labradorite, Marquise, Translucent

11.00ctw Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 24.32

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3.82ctw Green Prehnite, Oval, Transparent

3.82ctw Green Prehnite, Oval, Transparent

8.1 x 7 mm

$ 24.56

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3.66ct Yellow Citrine, Oval, VVS-VS

3.66ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.37

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1.65ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.65ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.9 x 5.2 mm

$ 5.43

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3.69ct Yellow Citrine, Oval, VVS-VS

3.69ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 28.29

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2.78ctw Red Pyrope Garnet, Marquise, VVS-VS

2.78ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.2 mm

$ 24.36

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0.81ct Yellow Color-Change Diaspore, Cushion, VVS

0.81ct Yellow Color-Change Diaspore, Cushion, VVS

6.1 x 4.8 mm

$ 42.76

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1.07ct Multicolor Opal, Oval, Translucent

1.07ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 49.24

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14.28ct Multicolor Pietersite, Cushion, Opaque

14.28ct Multicolor Pietersite, Cushion, Opaque

15 x 15 mm (calibrated)

$ 34.99

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0.84ctw Orange Spessartite Garnet, Oval, VS

0.84ctw Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 29.28

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1.97ctw Orange Citrine, Heart, VS

1.97ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 16.35

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0.60ct Violet Amethyst, Emerald Cut, VS

0.60ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.49

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 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

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 have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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