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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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9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 54.62

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7.14ct Brown Rutile Quartz, Round, Translucent

7.14ct Brown Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 17.92

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5.85ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.85ct Brown Cat'S Eye Scapolite, Oval, Translucent

11.8 x 9 mm

$ 29.13

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3.36ct Orange Sphalerite, Emerald Cut, SI
Sphalerite Product Video (690772)

3.36ct Orange Sphalerite, Emerald Cut, SI

9.3 x 6.5 mm

$ 167.33

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22.63ct Black Obsidian, Baguette, Opaque

22.63ct Black Obsidian, Baguette, Opaque

31.5 x 14.1 mm

$ 11.27

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6.30ct Pink Kunzite, Pear Shape, VS

6.30ct Pink Kunzite, Pear Shape, VS

12 x 10 mm (calibrated)

$ 144.48

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9.24ct Pink Strawberry Quartz, Oval, Translucent

9.24ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 58.11

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205.80ct Multicolor Jasper, Round, Opaque
Jasper Product Video (346704)

205.80ct Multicolor Jasper, Round, Opaque

55.7 mm

$ 153.73

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6.16ct Green Apatite, Emerald Cut, VS-SI
Apatite Product Video (396131)

6.16ct Green Apatite, Emerald Cut, VS-SI

10 x 10 mm (calibrated)

$ 250.71

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0.12ct Black Diamond, Square, Opaque
Diamond Product Video (677850)

0.12ct Black Diamond, Square, Opaque

2.5 x 2.4 mm

$ 50.42

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30.47ct Brown Moonstone, Fancy, Opaque

30.47ct Brown Moonstone, Fancy, Opaque

25 x 18 mm (calibrated)

$ 35.05

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39.74ct Brown Moonstone, Oval, Opaque

39.74ct Brown Moonstone, Oval, Opaque

25 x 18 mm (calibrated)

$ 65.30

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0.67ct Green Peridot, Square, VVS-VS
Peridot Product Video (527303)

0.67ct Green Peridot, Square, VVS-VS

5 x 5 mm (calibrated)

$ 9.20

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1.07ct Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (415390)

1.07ct Green Tsavorite Garnet, Pear Shape, VS

8.1 x 5.2 mm

$ 703.38

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4.55ct Multicolor Fire Agate, Fancy, Opaque

4.55ct Multicolor Fire Agate, Fancy, Opaque

10.7 x 10.2 mm

$ 64.10

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1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5.3 mm

$ 57.72

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83.34ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque
Psilomelane Dendrite Product Video (691651)

83.34ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque

54.9 x 31 mm

$ 49.80

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12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque
Tiger's Eye Product Video (526454)

12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 12.58

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3.75ct Multicolor Ruby In Fuchsite, Marquise, Translucent

3.75ct Multicolor Ruby In Fuchsite, Marquise, Translucent

19.8 x 9.2 mm

$ 28.05

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1.68ct Orange Hessonite Garnet, Cushion, VS-SI

1.68ct Orange Hessonite Garnet, Cushion, VS-SI

6.7 x 6.7 mm

$ 27.23

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2.70ct Pink Tourmaline, Emerald Cut, VS-SI
Tourmaline Product Video (545126)

2.70ct Pink Tourmaline, Emerald Cut, VS-SI

9.4 x 6.1 mm

$ 170.09

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1.18ct Red Rhodolite Garnet, Oval, VVS-VS
Rhodolite Garnet Product Video (503909)

1.18ct Red Rhodolite Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 27.33

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7.51ct Multicolor Coral, Round, Translucent
Coral Product Video (517241)

7.51ct Multicolor Coral, Round, Translucent

14 mm (calibrated)

$ 23.77

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1.32ct Orange Sphalerite, Emerald Cut, I1

1.32ct Orange Sphalerite, Emerald Cut, I1

7 x 5 mm (calibrated)

$ 65.74

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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
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
→ View All GemSelect Reviews on Bizrate
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