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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
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1.04ct Green Chrome Diopside, Marquise, VS-SI
Chrome Diopside Product Video (724764)

1.04ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 25.90

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0.52ct Orange Sphalerite, Round, SI

0.52ct Orange Sphalerite, Round, SI

4.8 mm

$ 25.90

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3.48ct Pink Rose Quartz, Emerald Cut, Transparent

3.48ct Pink Rose Quartz, Emerald Cut, Transparent

9.5 x 9.4 mm

$ 19.07

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20.45ct Brown Tiger'S Eye, Oval, Opaque
Tiger's Eye Product Video (389961)

20.45ct Brown Tiger'S Eye, Oval, Opaque

24.8 x 16.6 mm

$ 44.81

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0.96ct Red Rhodolite Garnet, Emerald Cut, VS

0.96ct Red Rhodolite Garnet, Emerald Cut, VS

5.9 x 4.8 mm

$ 43.20

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1.01ctw Green Peridot, Oval, Transparent

1.01ctw Green Peridot, Oval, Transparent

6 x 4.2 mm

$ 18.11

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34.72ct Multicolor Rainbow Moonstone, Fancy, Opaque

34.72ct Multicolor Rainbow Moonstone, Fancy, Opaque

36.5 x 11.8 mm

$ 2.88

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0.42ct Yellow Citrine, Heart, VVS

0.42ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.34

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2.06ct Orange Hessonite Garnet, Square, VS-SI

2.06ct Orange Hessonite Garnet, Square, VS-SI

7 x 7 mm (calibrated)

$ 45.14

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3.41ctw Red Pyrope Garnet, Emerald Cut, VS

3.41ctw Red Pyrope Garnet, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 23.77

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0.77ct White Rainbow Moonstone, Oval, Transparent

0.77ct White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 13.04

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0.74ct Yellow Citrine, Heart, VVS

0.74ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.16

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29.15ct Pink Coral, Flower Cut, Opaque
Coral Product Video (333717)

29.15ct Pink Coral, Flower Cut, Opaque

25 x 16.7 mm

$ 415.18

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0.57ct Yellow Spessartite Garnet, Oval, VS

0.57ct Yellow Spessartite Garnet, Oval, VS

5.1 x 4.2 mm

$ 17.03

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0.96ctw Red Pyrope Garnet, Square, VVS-VS

0.96ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.36

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10.69ct Yellow Rutile Quartz, Pear Shape, Transparent

10.69ct Yellow Rutile Quartz, Pear Shape, Transparent

16.6 x 13.3 mm

$ 40.99

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0.98ct Yellow Beryl, Trillion, VVS

0.98ct Yellow Beryl, Trillion, VVS

8.1 x 7.4 mm

$ 19.52

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2.55ct Green Tourmaline, Emerald Cut, VVS-VS

2.55ct Green Tourmaline, Emerald Cut, VVS-VS

15.9 x 4.6 mm

$ 69.85

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13.94ct Green Malachite, Baguette, Opaque

13.94ct Green Malachite, Baguette, Opaque

12.7 x 10.2 mm

$ 16.64

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1.19ct Green Sphene, Oval, VS-SI

1.19ct Green Sphene, Oval, VS-SI

7.2 x 6 mm

$ 65.19

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18.51ct Pink Rose Quartz, Oval, Transparent

18.51ct Pink Rose Quartz, Oval, Transparent

19.5 x 16 mm

$ 101.40

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32.33ct Multicolor Jasper, Pear Shape, Opaque

32.33ct Multicolor Jasper, Pear Shape, Opaque

31 x 19.4 mm

$ 19.83

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79.96ct Green Moss Agate, Square, Opaque

79.96ct Green Moss Agate, Square, Opaque

26.6 x 26.1 mm

$ 66.37

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1.75ct Pink Strawberry Quartz, Oval, Translucent

1.75ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.75

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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

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo 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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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