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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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12.25ct Green Tourmaline, Oval, VVS-VS
Tourmaline Product Video (416463)

12.25ct Green Tourmaline, Oval, VVS-VS

15.7 x 12.8 mm

$ 2,033.50

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27.28ctw Multicolor Fossil Coral, Cushion, Opaque
Fossil Coral Product Video (514176)

27.28ctw Multicolor Fossil Coral, Cushion, Opaque

17 x 12.9 mm

$ 49.31

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9.93ct Brown Smoky Quartz, Round, VVS-VS
Smoky Quartz Product Video (602189)

9.93ct Brown Smoky Quartz, Round, VVS-VS

15 mm (calibrated)

$ 40.03

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35.09ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521447)

35.09ct Multicolor Quartz With Marcasite, Oval, Transparent

28.7 x 21.5 mm

$ 230.67

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5.18ct Blue Aquamarine, Oval, VVS
Aquamarine Product Video (453037)

5.18ct Blue Aquamarine, Oval, VVS

10.4 x 9.8 mm

$ 987.48

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7.57ct Pink Strawberry Quartz, Oval, Translucent

7.57ct Pink Strawberry Quartz, Oval, Translucent

12.9 x 10.1 mm

$ 45.62

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9.62ctw Pink Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (608860)

9.62ctw Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 147.56

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2.50ct Green Peridot, Cushion, VS-SI

2.50ct Green Peridot, Cushion, VS-SI

8.9 x 7.9 mm

$ 82.17

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24.38ctw Purple Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (522378)

24.38ctw Purple Tourmaline, Flower Cut, Transparent

19.2 x 17.3 mm

$ 101.18

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5.95ct Green Apatite, Emerald Cut, VS
Apatite Product Video (399658)

5.95ct Green Apatite, Emerald Cut, VS

10 x 10 mm (calibrated)

$ 312.25

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13.08ct Pink Rose Quartz, Emerald Cut, Transparent

13.08ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 71.65

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0.14ct Black Diamond, Square, Opaque

0.14ct Black Diamond, Square, Opaque

2.6 x 2.4 mm

$ 69.72

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22.73ct Multicolor Pietersite, Oval, Opaque

22.73ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 99.61

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31.21ct Multicolor Peanut Wood, Cushion, Opaque

31.21ct Multicolor Peanut Wood, Cushion, Opaque

37.2 x 17 mm

$ 18.66

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31.44ct Multicolor Rhodochrosite, Pear Shape, Opaque
Rhodochrosite Product Video (237441)

31.44ct Multicolor Rhodochrosite, Pear Shape, Opaque

34.2 x 16.1 mm

$ 86.11

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3.95ct Yellow Apatite, Pear Shape, VS

3.95ct Yellow Apatite, Pear Shape, VS

13 x 9 mm (calibrated)

$ 129.83

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1.50ct Purple Spinel, Cushion, VS

1.50ct Purple Spinel, Cushion, VS

7.1 x 6 mm

$ 138.88

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12.38ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (485809)

12.38ct Green Actinolite Cat'S Eye, Oval, Translucent

16.5 x 13.5 mm

$ 86.31

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38.36ct Multicolor Jasper, Marquise, Opaque

38.36ct Multicolor Jasper, Marquise, Opaque

50.6 x 17.5 mm

$ 38.20

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0.30ct Green Peridot, Emerald Cut, VVS-VS
Peridot Product Video (527301)

0.30ct Green Peridot, Emerald Cut, VVS-VS

5 x 3 mm (calibrated)

$ 4.06

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14.76ct Yellow Apatite, Oval, VS
Apatite Product Video (400909)

14.76ct Yellow Apatite, Oval, VS

16.5 x 13.5 mm

$ 1,293.69

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44.70ct Multicolor Rhodochrosite, Pear Shape, Translucent

44.70ct Multicolor Rhodochrosite, Pear Shape, Translucent

33.5 x 21.7 mm

$ 34.28

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33.12ct White Howlite, Round, Opaque

33.12ct White Howlite, Round, Opaque

27.5 mm

$ 16.49

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1.99ctw White Sillimanite Cat'S Eye, Oval, Transparent

1.99ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5.6 mm

$ 6.54

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 -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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