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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

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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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1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

9.5 x 5.5 mm

$ 64.64

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4.06ct Orange Sunstone, Round, Translucent

4.06ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 37.07

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31.32ct Black Tourmaline, Emerald Cut, Opaque

31.32ct Black Tourmaline, Emerald Cut, Opaque

25 x 15 mm

$ 129.98

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3000.00ct Green Malachite, Oval, Opaque
Malachite Product Video (377422)

3000.00ct Green Malachite, Oval, Opaque

139.4 x 82.7 mm

$ 1,220.10

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12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

18.9 x 13.2 mm

$ 95.96

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8.20ct Pink Rose Quartz, Emerald Cut, Transparent

8.20ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 44.92

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7.12ct Green Amazonite, Marquise, Opaque

7.12ct Green Amazonite, Marquise, Opaque

19.7 x 9.9 mm

$ 17.08

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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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29.82ctw Multicolor Fossil Coral, Oval, Opaque

29.82ctw Multicolor Fossil Coral, Oval, Opaque

20.3 x 13 mm

$ 38.55

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9.59ct Yellow Citrine, Round, VVS-VS
Citrine Product Video (512416)

9.59ct Yellow Citrine, Round, VVS-VS

14 mm (calibrated)

$ 52.55

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0.21ct Green Kornerupine, Round, SI
Kornerupine Product Video (564783)

0.21ct Green Kornerupine, Round, SI

3.8 mm

$ 79.32

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1.18ct Green Tsavorite Garnet, Cushion, VS-SI
Tsavorite Garnet Product Video (415400)

1.18ct Green Tsavorite Garnet, Cushion, VS-SI

5.8 x 5.3 mm

$ 775.68

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14.98ct Turquoise Grandidierite, Oval, SI-I1
Grandidierite Product Video (568868)

14.98ct Turquoise Grandidierite, Oval, SI-I1

17.5 x 14.6 mm

$ 672.90

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56.12ctw Gray Hematite, Baguette, Opaque

56.12ctw Gray Hematite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 54.73

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5.13ct Brown Smoky Quartz, Round, VS

5.13ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 20.68

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0.51ctw White Diamond, Heart, VVS
Diamond Product Video (685659)

0.51ctw White Diamond, Heart, VVS

3.3 x 2.9 mm

$ 2,077.86

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1.96ct Brown Tiger'S Eye, Marquise, Opaque

1.96ct Brown Tiger'S Eye, Marquise, Opaque

12 x 6 mm (calibrated)

$ 2.54

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0.97ct Yellow Color-Change Garnet, Cushion, VS-SI

0.97ct Yellow Color-Change Garnet, Cushion, VS-SI

6.8 x 4.2 mm

$ 86.09

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1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.3 mm

$ 4.86

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1.81ct Brown Diamond, Round, SI
Diamond Product Video (378645)

1.81ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 4,687.18

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43.72ct Blue Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (403262)

43.72ct Blue Cat'S Eye Aquamarine, Oval, Translucent

22 x 19 mm

$ 670.60

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24.44ct White Rainbow Moonstone, Marquise, Transparent

24.44ct White Rainbow Moonstone, Marquise, Transparent

29 x 13.7 mm

$ 194.73

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13.22ct Multicolor Ruby In Fuchsite, Marquise, Translucent
Ruby in Fuchsite Product Video (384723)

13.22ct Multicolor Ruby In Fuchsite, Marquise, Translucent

23.9 x 15.1 mm

$ 98.92

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32.34ctw Multicolor Labradorite, Oval, Translucent

32.34ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 70.87

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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

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I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
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Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
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Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate
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