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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
Single
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2.91ctw Blue Kyanite, Oval, SI

2.91ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 50.48

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57.85ct Blue Larimar, Fancy, Opaque
Larimar Product Video (492445)

57.85ct Blue Larimar, Fancy, Opaque

31.4 x 30.1 mm

$ 570.47

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33.05ct Multicolor Pietersite, Oval, Opaque

33.05ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 108.63

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9.86ct Multicolor Fire Agate, Fancy, Opaque

9.86ct Multicolor Fire Agate, Fancy, Opaque

16.9 x 12.3 mm

$ 77.35

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127.45ct Purple Star Ruby, Oval, Opaque
Star Ruby Product Video (513650)

127.45ct Purple Star Ruby, Oval, Opaque

28.6 x 26.2 mm

$ 1,745.43

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16.89ct Brown Moonstone, Round, Translucent

16.89ct Brown Moonstone, Round, Translucent

17 mm (calibrated)

$ 46.26

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23.21ctw Multicolor Pietersite, Fancy, Opaque

23.21ctw Multicolor Pietersite, Fancy, Opaque

31.2 x 18.6 mm

$ 87.61

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121.07ct Multicolor Chrysocolla, Trillion, Opaque
Chrysocolla Product Video (658616)

121.07ct Multicolor Chrysocolla, Trillion, Opaque

45.1 x 40.4 mm

$ 206.21

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0.23ct Yellow Diamond, Round, VS
Diamond Product Video (564615)

0.23ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 419.90

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0.25ctw White Diamond, Round, VVS-VS
Diamond Product Video (565079)

0.25ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 378.51

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7 x 4.4 mm

$ 27.61

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25.67ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

25.67ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 22.50

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40.83ct Multicolor Agate Geode, Fancy, Opaque
Agate Geode Product Video (391994)

40.83ct Multicolor Agate Geode, Fancy, Opaque

27.6 x 27.5 mm

$ 44.91

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6.50ct Blue Larimar, Round, Opaque

6.50ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 74.27

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0.25ct Yellow Diamond, Round, VS-SI
Diamond Product Video (564633)

0.25ct Yellow Diamond, Round, VS-SI

4 mm (calibrated)

$ 380.34

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9.68ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (691480)

9.68ct Purple Kunzite, Pear Shape, VVS-VS

15.2 x 10.9 mm

$ 266.39

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2.99ct Brown Cat'S Eye Scapolite, Round, Translucent

2.99ct Brown Cat'S Eye Scapolite, Round, Translucent

9.5 mm (calibrated)

$ 16.38

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1.29ct Yellow Chrysoberyl, Pear Shape, VS
Chrysoberyl Product Video (366654)

1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

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11.46ct Yellow Apatite, Oval, VS
Apatite Product Video (614758)

11.46ct Yellow Apatite, Oval, VS

16 x 12 mm (calibrated)

$ 520.69

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3.23ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (310827)

3.23ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 143.42

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2.50ct Green Peridot, Cushion, VS
Peridot Product Video (332275)

2.50ct Green Peridot, Cushion, VS

9.7 x 7.5 mm

$ 82.17

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24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

34.5 x 13.3 mm

$ 68.32

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1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366561)

1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS

8.2 x 5.6 mm

$ 131.69

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9.29ctw Pink Morganite, Round, Translucent

9.29ctw Pink Morganite, Round, Translucent

10 mm (calibrated)

$ 101.78

View Gem
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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 to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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