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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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0.96ct Yellow Sphalerite, Oval, SI-I1

0.96ct Yellow Sphalerite, Oval, SI-I1

6 x 5 mm

$ 47.81

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1.97ct Brown Rutile Quartz, Round, Translucent
Rutile Quartz Product Video (503694)

1.97ct Brown Rutile Quartz, Round, Translucent

8 mm (calibrated)

$ 4.77

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14.41ct Violet Amethyst, Flower Cut, Translucent

14.41ct Violet Amethyst, Flower Cut, Translucent

17.2 x 16.5 mm

$ 47.36

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7.46ct Brown Smoky Quartz, Round, VVS-VS

7.46ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 12.26

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5.53ct Violet Amethyst, Briolette, VS

5.53ct Violet Amethyst, Briolette, VS

13.4 x 7.9 mm

$ 20.19

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0.60ct Yellow Color-Change Garnet, Emerald Cut, VS

0.60ct Yellow Color-Change Garnet, Emerald Cut, VS

7.1 x 3.5 mm

$ 72.01

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1.41ctw Green Demantoid Garnet, Round, VS
Demantoid Garnet Product Video (255621)

1.41ctw Green Demantoid Garnet, Round, VS

3.5 mm (calibrated)

$ 195.78

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4.75ct Violet Amethyst, Round, Transparent

4.75ct Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 33.12

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3.45ctw Brown Diamond, Square, VS-SI
Diamond Product Video (460460)

3.45ctw Brown Diamond, Square, VS-SI

6.8 x 6.6 mm

$ 7,937.62

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5.46ct Violet Amethyst, Round, Transparent

5.46ct Violet Amethyst, Round, Transparent

12 mm (calibrated)

$ 38.06

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0.50ct Green Tourmaline, Baguette, VVS-VS

0.50ct Green Tourmaline, Baguette, VVS-VS

5.2 x 3.8 mm

$ 20.75

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5.35ct Orange Moonstone, Round, Translucent

5.35ct Orange Moonstone, Round, Translucent

10 mm (calibrated)

$ 8.92

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1.37ct Brown Tiger'S Eye, Marquise, Opaque

1.37ct Brown Tiger'S Eye, Marquise, Opaque

10 x 5 mm (calibrated)

$ 1.78

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1.54ct Yellow Diamond, Round, SI
Diamond Product Video (378641)

1.54ct Yellow Diamond, Round, SI

7 mm (calibrated)

$ 4,386.78

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1.15ct Brown Diamond, Cushion, VS-SI
Diamond Product Video (460448)

1.15ct Brown Diamond, Cushion, VS-SI

6.3 x 5.6 mm

$ 2,645.87

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63.68ct Multicolor Tourmaline, Fancy, Translucent
Tourmaline Product Video (666915)

63.68ct Multicolor Tourmaline, Fancy, Translucent

33.2 x 25.2 mm

$ 951.38

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22.53ct Brown Tiger'S Eye, Fancy, Opaque

22.53ct Brown Tiger'S Eye, Fancy, Opaque

33.2 x 9.2 mm

$ 6.73

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1.84ct Orange Hessonite Garnet, Oval, VS

1.84ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 36.65

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11.89ct Blue Aquamarine, Baguette, VVS
Aquamarine Product Video (450372)

11.89ct Blue Aquamarine, Baguette, VVS

16.8 x 9.9 mm

$ 3,256.67

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4.85ct Green Tourmaline, Flower Cut, Translucent

4.85ct Green Tourmaline, Flower Cut, Translucent

15.3 x 11.7 mm

$ 44.28

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1.41ct Brown Color-Change Garnet, Pear Shape, VS

1.41ct Brown Color-Change Garnet, Pear Shape, VS

9.1 x 5.3 mm

$ 112.65

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34.63ct Multicolor Jasper, Fancy, Opaque

34.63ct Multicolor Jasper, Fancy, Opaque

27.6 x 23.6 mm

$ 16.43

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24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 15.26

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19.07ct White Howlite, Pear Shape, Opaque

19.07ct White Howlite, Pear Shape, Opaque

26.1 x 16.4 mm

$ 8.92

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 -> 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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 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 loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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