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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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8.55ct Violet Amethyst, Pear Shape, VS

8.55ct Violet Amethyst, Pear Shape, VS

18 x 13 mm (calibrated)

$ 67.26

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5.50ct Violet Amethyst, Cushion, VVS-VS

5.50ct Violet Amethyst, Cushion, VVS-VS

15 x 8.9 mm

$ 38.35

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6.24ct Multicolor Amethyst Geode Slice, Fancy, Transparent

6.24ct Multicolor Amethyst Geode Slice, Fancy, Transparent

14.9 x 12.6 mm

$ 6.66

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2.03ct Green Sphene, Oval, Transparent

2.03ct Green Sphene, Oval, Transparent

8.1 x 6.6 mm

$ 10.11

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0.61ctw Blue Kyanite, Round, VS

0.61ctw Blue Kyanite, Round, VS

3.7 mm

$ 15.19

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4.73ct Green Prehnite, Pear Shape, Transparent/Translucent

4.73ct Green Prehnite, Pear Shape, Transparent/Translucent

11 x 9 mm (calibrated)

$ 8.64

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0.97ctw Yellow Citrine, Marquise, VVS-VS

0.97ctw Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 5.79

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 27.49

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2.28ct Pink Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (749292)

2.28ct Pink Tourmaline, Emerald Cut, VVS

7.9 x 6.7 mm

$ 130.58

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46.18ct Red Strawberry Quartz, Fancy, Opaque

46.18ct Red Strawberry Quartz, Fancy, Opaque

39.3 x 12.1 mm

$ 4.60

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3.78ct Yellow Opal, Oval, Opaque

3.78ct Yellow Opal, Oval, Opaque

11.3 x 7.4 mm

$ 18.90

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19.18ct Multicolor Agate, Oval, Opaque

19.18ct Multicolor Agate, Oval, Opaque

17.4 x 15.9 mm

$ 32.48

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34.41ct Violet Amethyst, Oval, VVS
Amethyst Product Video (734697)

34.41ct Violet Amethyst, Oval, VVS

25.3 x 18.9 mm

$ 274.18

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0.84ct Green Peridot, Oval, VS

0.84ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.86

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3.48ct Brown Tiger'S Eye, Pear Shape, Opaque

3.48ct Brown Tiger'S Eye, Pear Shape, Opaque

10 x 10 mm (calibrated)

$ 4.50

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1.88ct Gray Tourmaline, Round, Transparent

1.88ct Gray Tourmaline, Round, Transparent

7 mm (calibrated)

$ 31.56

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2.19ct Orange Moonstone, Trillion, Translucent

2.19ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.37

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8.09ctw Violet Amethyst, Oval, Transparent

8.09ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 44.32

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1.93ctw Orange Sunstone, Oval, Translucent

1.93ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.45

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9.61ct Violet Amethyst, Square, VVS-VS

9.61ct Violet Amethyst, Square, VVS-VS

14 x 14 mm (calibrated)

$ 73.70

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7.11ctw White Moonstone, Round, Translucent

7.11ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 19.47

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1.22ctw Yellow Citrine, Pear Shape, VS

1.22ctw Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 6.68

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3.98ctw Multicolor Opal, Square, Transparent

3.98ctw Multicolor Opal, Square, Transparent

4.3 x 4.1 mm

$ 28.25

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5.18ct Pink Rose Quartz, Round, Transparent

5.18ct Pink Rose Quartz, Round, Transparent

11 mm (calibrated)

$ 39.73

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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 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

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

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