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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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0.44ct Pink Spinel, Cushion, VS

0.44ct Pink Spinel, Cushion, VS

4.7 x 4 mm

$ 30.68

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2.45ct Multicolor Labradorite, Pear Shape, Translucent

2.45ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.42

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1.24ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

1.24ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

5.7 x 5.5 mm

$ 46.31

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46.57ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

46.57ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

37.7 x 21.9 mm

$ 46.38

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11.11ct Multicolor Agate, Fancy, Opaque

11.11ct Multicolor Agate, Fancy, Opaque

17.9 x 7.8 mm

$ 19.46

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0.50ct Green Tourmaline, Baguette, VVS

0.50ct Green Tourmaline, Baguette, VVS

11 x 2.5 mm

$ 17.43

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5.19ct Violet Amethyst, Oval, Transparent

5.19ct Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 23.70

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2.00ct Red Ruby, Oval, VS-SI
Ruby Product Video (569415)

2.00ct Red Ruby, Oval, VS-SI

9 x 7 mm (calibrated)

$ 12,234.65

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24.67ctw Multicolor Fossil Coral, Cushion, Opaque

24.67ctw Multicolor Fossil Coral, Cushion, Opaque

18.9 x 11.2 mm

$ 48.65

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3.05ctw Red Pyrope Garnet, Square, VS

3.05ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 23.40

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2.44ct Orange Hessonite Garnet, Oval, VS-SI

2.44ct Orange Hessonite Garnet, Oval, VS-SI

9.2 x 7.7 mm

$ 44.54

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0.96ct Pink Morganite, Pear Shape, VS

0.96ct Pink Morganite, Pear Shape, VS

8.8 x 4.9 mm

$ 57.85

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1.07ctw Blue Kyanite, Oval, SI-I1

1.07ctw Blue Kyanite, Oval, SI-I1

6 x 4 mm (calibrated)

$ 23.45

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1.19ct Yellow Beryl, Trillion, VS

1.19ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 28.44

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28.45ct Multicolor Jasper, Fancy, Opaque

28.45ct Multicolor Jasper, Fancy, Opaque

35.9 x 9.9 mm

$ 17.15

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15.89ct Multicolor Amethyst Geode Slice, Fancy, Transparent

15.89ct Multicolor Amethyst Geode Slice, Fancy, Transparent

21.8 x 16.9 mm

$ 16.93

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2.13ct Red Almandine Garnet, Oval, VS

2.13ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 79.56

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1.51ct Purple Spinel, Cushion, VVS-VS

1.51ct Purple Spinel, Cushion, VVS-VS

6.8 x 6.5 mm

$ 103.24

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0.25ct Pink Morganite, Round, VS-SI

0.25ct Pink Morganite, Round, VS-SI

4.5 mm (calibrated)

$ 10.38

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1.52ct Yellow Sphene, Oval, Transparent

1.52ct Yellow Sphene, Oval, Transparent

6.9 x 6 mm

$ 7.57

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7.25ct Multicolor Labradorite, Round, Translucent

7.25ct Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 15.60

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3.10ct Pink Morganite, Round, Translucent

3.10ct Pink Morganite, Round, Translucent

9 mm (calibrated)

$ 33.62

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30.50ctw Multicolor Fossil Coral, Oval, Opaque

30.50ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 14.2 mm

$ 60.15

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7.03ct Multicolor Coral, Pear Shape, Opaque

7.03ct Multicolor Coral, Pear Shape, Opaque

17.4 x 12.1 mm

$ 21.95

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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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
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

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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