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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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18.83ct Blue Color-Change Fluorite, Oval, VS
Color-Change Fluorite Product Video (445414)

18.83ct Blue Color-Change Fluorite, Oval, VS

20 x 15 mm (calibrated)

$ 431.18

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2.54ct Brown Cat'S Eye Scapolite, Oval, Translucent

2.54ct Brown Cat'S Eye Scapolite, Oval, Translucent

8.6 x 8 mm

$ 13.91

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11.45ctw Green Amazonite, Cushion, Opaque

11.45ctw Green Amazonite, Cushion, Opaque

10 x 10 mm (calibrated)

$ 23.21

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41.49ct Brown Tiger'S Eye, Cushion, Opaque

41.49ct Brown Tiger'S Eye, Cushion, Opaque

27.3 x 23.9 mm

$ 41.33

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1.11ct Yellow Sphene, Pear Shape, VS-SI

1.11ct Yellow Sphene, Pear Shape, VS-SI

8 x 5.5 mm

$ 36.49

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10.14ct White Quartz Cat'S Eye, Round, Transparent

10.14ct White Quartz Cat'S Eye, Round, Transparent

13 mm (calibrated)

$ 44.44

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1.77ct Brown Color-Change Garnet, Pear Shape, VS-SI
Color-Change Garnet Product Video (344767)

1.77ct Brown Color-Change Garnet, Pear Shape, VS-SI

10.5 x 6 mm

$ 158.66

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2.71ct Green Tourmaline, Emerald Cut, VVS-VS

2.71ct Green Tourmaline, Emerald Cut, VVS-VS

15.7 x 5 mm

$ 74.53

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26.46ct Blue Chalcedony, Pear Shape, Opaque
Chalcedony Product Video (694293)

26.46ct Blue Chalcedony, Pear Shape, Opaque

33.4 x 17.6 mm

$ 65.89

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2.60ct Green Tourmaline, Emerald Cut, VVS

2.60ct Green Tourmaline, Emerald Cut, VVS

21.1 x 4 mm

$ 71.21

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1.08ct Green Peridot, Pear Shape, VS
Peridot Product Video (526451)

1.08ct Green Peridot, Pear Shape, VS

8 x 6 mm (calibrated)

$ 15.49

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11.91ct Yellow Cat'S Eye Opal, Oval, Opaque
Cat's Eye Opal Product Video (484212)

11.91ct Yellow Cat'S Eye Opal, Oval, Opaque

15.5 x 13 mm

$ 59.31

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9.34ct Orange Star Moonstone, Oval, Translucent

9.34ct Orange Star Moonstone, Oval, Translucent

18.8 x 10.6 mm

$ 37.21

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7.78ct Turquoise Grandidierite, Cushion, VS-SI
Grandidierite Product Video (472024)

7.78ct Turquoise Grandidierite, Cushion, VS-SI

15.2 x 10.7 mm

$ 1,704.75

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 254.36

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43.20ct Brown Tiger'S Eye, Pear Shape, Opaque

43.20ct Brown Tiger'S Eye, Pear Shape, Opaque

33.3 x 22.3 mm

$ 37.86

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7.55ct Yellow Citrine, Pear Shape, VVS-VS
Citrine Product Video (508372)

7.55ct Yellow Citrine, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 48.27

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3.65ct Yellow Cat'S Eye Opal, Oval, Opaque

3.65ct Yellow Cat'S Eye Opal, Oval, Opaque

11.4 x 8.1 mm

$ 15.15

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2.11ct Red Coral, Oval, Opaque
Coral Product Video (499209)

2.11ct Red Coral, Oval, Opaque

11.9 x 5 mm

$ 288.96

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8.21ct Turquoise Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439657)

8.21ct Turquoise Hemimorphite Druzy, Fancy, Opaque

13.6 x 10.2 mm

$ 134.92

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15.01ct Black Nuummite, Oval, Opaque

15.01ct Black Nuummite, Oval, Opaque

19.7 x 11.5 mm

$ 65.93

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24.08ct Green Tourmaline, Oval, VVS
Tourmaline Product Video (417191)

24.08ct Green Tourmaline, Oval, VVS

17.4 x 14.5 mm

$ 3,997.28

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6.54ct Green Apatite, Emerald Cut, VS
Apatite Product Video (399659)

6.54ct Green Apatite, Emerald Cut, VS

11 x 11 mm (calibrated)

$ 343.22

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143.91ct Multicolor Rhodochrosite, Fancy, Opaque
Rhodochrosite Product Video (471437)

143.91ct Multicolor Rhodochrosite, Fancy, Opaque

43.7 x 25.5 mm

$ 132.70

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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 -> 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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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