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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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3.51ctw Multicolor Andalusite, Round, VS

3.51ctw Multicolor Andalusite, Round, VS

3.1 mm

$ 154.33

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14.90ct Green Opal, Oval, Opaque

14.90ct Green Opal, Oval, Opaque

18.4 x 14.5 mm

$ 34.57

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3.95ct Yellow Citrine, Oval, VVS

3.95ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 31.47

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3.24ct Yellow Citrine, Oval, VVS-VS

3.24ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.85

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0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 26.15

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1.93ct Yellow Beryl, Round, VVS-VS

1.93ct Yellow Beryl, Round, VVS-VS

8 mm (calibrated)

$ 46.13

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2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 20.95

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3.73ct Yellow Citrine, Pear Shape, VVS-VS

3.73ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.41

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1.05ct Violet Amethyst, Marquise, VVS-VS

1.05ct Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 6.97

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15.33ct Multicolor Agate, Oval, Opaque

15.33ct Multicolor Agate, Oval, Opaque

16.3 x 14.7 mm

$ 14.50

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14.78ctw Black Spinel, Round, Opaque

14.78ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 48.57

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0.20ct Green Kornerupine, Round, VS

0.20ct Green Kornerupine, Round, VS

3.7 mm

$ 9.13

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2.27ct Red Almandine Garnet, Oval, VVS-VS

2.27ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 84.78

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33.24ct Pink Rose Quartz, Pear Shape, Transparent

33.24ct Pink Rose Quartz, Pear Shape, Transparent

25.7 x 20.9 mm

$ 72.84

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1.95ct Yellow Rutile Topaz, Pear Shape, Transparent

1.95ct Yellow Rutile Topaz, Pear Shape, Transparent

8 x 8 mm (calibrated)

$ 40.46

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3.66ct Pink Strawberry Quartz, Oval, Translucent

3.66ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 28.07

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1.90ctw Red Pyrope Garnet, Heart, VVS-VS

1.90ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 14.57

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1.26ct Orange Zircon, Round, VVS-VS

1.26ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 30.06

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2.09ct Red Almandine Garnet, Marquise, VVS-VS

2.09ct Red Almandine Garnet, Marquise, VVS-VS

12 x 6 mm (calibrated)

$ 78.06

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7.89ct Brown Star Moonstone, Oval, Translucent

7.89ct Brown Star Moonstone, Oval, Translucent

13.8 x 11.4 mm

$ 34.58

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19.33ct Violet Amethyst, Round, VVS-VS

19.33ct Violet Amethyst, Round, VVS-VS

18 mm (calibrated)

$ 134.77

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4.59ct Red Almandine Garnet, Oval, VVS

4.59ct Red Almandine Garnet, Oval, VVS

10 x 7 mm (calibrated)

$ 160.01

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4.49ctw Purple Rhodolite Garnet, Oval, VVS-VS

4.49ctw Purple Rhodolite Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 79.57

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20.41ct Brown Tiger'S Eye Matrix, Fancy, Opaque

20.41ct Brown Tiger'S Eye Matrix, Fancy, Opaque

21.2 x 14.8 mm

$ 20.33

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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

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 and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This was my first experience with this company. I had no difficulty finding the item I wanted, and checking out was a breeze! Ia'm hoping my item arrives quickly, intact, and of good quality. Overall, this was a very satisfactory experience.

Posted By Gem connoisseur in August, 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

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

Posted By CLTCJH in February, 2026
Source: Bizrate
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