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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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0.25ct Green Kornerupine, Baguette, VVS

0.25ct Green Kornerupine, Baguette, VVS

4.7 x 2.7 mm

$ 13.70

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3.84ct Multicolor Agate, Oval, Opaque

3.84ct Multicolor Agate, Oval, Opaque

9.7 x 8.7 mm

$ 6.51

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0.65ct Green Peridot, Pear Shape, VVS

0.65ct Green Peridot, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 5.83

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1.54ct Green Tourmaline, Oval, VVS

1.54ct Green Tourmaline, Oval, VVS

8 x 6 mm (calibrated)

$ 178.95

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0.26ct Green Kornerupine, Emerald Cut, VS

0.26ct Green Kornerupine, Emerald Cut, VS

4.2 x 3 mm

$ 14.24

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1.47ct Green Tourmaline, Emerald Cut, SI

1.47ct Green Tourmaline, Emerald Cut, SI

15.1 x 3.6 mm

$ 32.13

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30.47ct Yellow Obsidian, Oval, Opaque

30.47ct Yellow Obsidian, Oval, Opaque

33.2 x 21.6 mm

$ 26.71

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47.54ct Green Uvarovite Garnet Drusy, Fancy, Opaque

47.54ct Green Uvarovite Garnet Drusy, Fancy, Opaque

36.3 x 27.8 mm

$ 71.02

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1.10ct Pink Tourmaline, Emerald Cut, VVS-VS

1.10ct Pink Tourmaline, Emerald Cut, VVS-VS

6 x 5 mm

$ 79.54

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42.73ct Green Serpentine, Oval, Translucent

42.73ct Green Serpentine, Oval, Translucent

36.5 x 22.6 mm

$ 91.50

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0.44ct Green Peridot, Oval, VVS-VS

0.44ct Green Peridot, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 7.89

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1.17ct Green Sphene, Oval, Transparent

1.17ct Green Sphene, Oval, Transparent

6.8 x 5.9 mm

$ 6.42

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4.25ct Multicolor Opal, Oval, Transparent

4.25ct Multicolor Opal, Oval, Transparent

15.6 x 9.8 mm

$ 106.84

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6.07ct White Topaz, Cushion, VS

6.07ct White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 40.30

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6.18ct Violet Amethyst, Pear Shape, VS

6.18ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 47.40

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10.94ct Black Tourmaline, Emerald Cut, Opaque

10.94ct Black Tourmaline, Emerald Cut, Opaque

20.3 x 8.6 mm

$ 54.48

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3.21ctw Orange Moonstone, Trillion, Translucent

3.21ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 6.39

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1.13ct Orange Hessonite Garnet, Oval, VVS-VS

1.13ct Orange Hessonite Garnet, Oval, VVS-VS

7 x 5.6 mm

$ 22.51

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0.67ct Multicolor Opal, Pear Shape, Transparent

0.67ct Multicolor Opal, Pear Shape, Transparent

8 x 6.6 mm

$ 16.68

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1.75ct Yellow Citrine, Trillion, VVS-VS

1.75ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 10.84

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2.34ct Green Prehnite, Oval, Transparent

2.34ct Green Prehnite, Oval, Transparent

8.6 x 7.6 mm

$ 15.10

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10.43ct Brown Tiger'S Eye, Oval, Opaque

10.43ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 6.13

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4.06ct Yellow Citrine, Oval, VVS-VS

4.06ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 32.35

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1.00ct Violet Spinel, Oval, VS-SI

1.00ct Violet Spinel, Oval, VS-SI

6.9 x 5.7 mm

$ 103.02

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

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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