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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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2.45ctw Violet Amethyst, Oval, VVS-VS

2.45ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.43

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47.50ct Green Amazonite, Pear Shape, Opaque

47.50ct Green Amazonite, Pear Shape, Opaque

35.5 x 24.1 mm

$ 37.85

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3.15ct Pink Tourmaline, Emerald Cut, VS

3.15ct Pink Tourmaline, Emerald Cut, VS

9.6 x 6.6 mm

$ 155.31

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8.89ct Green Prehnite, Fancy, Transparent

8.89ct Green Prehnite, Fancy, Transparent

18 x 13 mm (calibrated)

$ 14.53

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27.79ct Green Aventurine, Fancy, Opaque

27.79ct Green Aventurine, Fancy, Opaque

40.2 x 9.3 mm

$ 2.31

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19.14ct Violet Amethyst, Round, VVS

19.14ct Violet Amethyst, Round, VVS

18 mm (calibrated)

$ 133.45

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0.78ct Black Diamond, Round, Opaque
Diamond Product Video (669020)

0.78ct Black Diamond, Round, Opaque

5.3 mm

$ 621.50

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6.06ct Brown Tiger'S Eye, Baguette, Opaque

6.06ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 3.32

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0.84ct Green Peridot, Oval, VS

0.84ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.71

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1.20ct Purple Spinel, Cushion, VS

1.20ct Purple Spinel, Cushion, VS

6.4 x 5.5 mm

$ 143.42

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11.54ct Yellow Citrine, Oval, VVS

11.54ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 63.21

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0.79ct White Sillimanite Cat'S Eye, Oval, Transparent

0.79ct White Sillimanite Cat'S Eye, Oval, Transparent

5.3 x 5 mm

$ 3.04

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6.30ctw White Moonstone, Round, Translucent

6.30ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 17.26

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0.82ct Orange Zircon, Oval, VVS

0.82ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 20.42

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1.46ct Purple Sapphire, Round, VS
Sapphire Product Video (756674)

1.46ct Purple Sapphire, Round, VS

6.5 mm (calibrated)

$ 3,650.00

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3.06ct Violet Amethyst, Trillion, VS

3.06ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.46

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40.74ct Multicolor Jasper, Oval, Opaque

40.74ct Multicolor Jasper, Oval, Opaque

46.4 x 20.5 mm

$ 44.63

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1.54ct Pink Morganite, Oval, VS

1.54ct Pink Morganite, Oval, VS

8.2 x 6.7 mm

$ 118.11

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8.95ct Green Druzy Variscite, Fancy, Opaque

8.95ct Green Druzy Variscite, Fancy, Opaque

28.5 x 12.3 mm

$ 12.48

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1.23ct Multicolor Opal, Pear Shape, Transparent

1.23ct Multicolor Opal, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 30.63

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1.38ct Orange Sunstone, Oval, Translucent

1.38ct Orange Sunstone, Oval, Translucent

8.4 x 6.5 mm

$ 8.25

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1.22ct Green Tourmaline, Emerald Cut, VS

1.22ct Green Tourmaline, Emerald Cut, VS

15.3 x 3.4 mm

$ 26.66

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1.54ct Brown Tiger'S Eye, Round, Opaque

1.54ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 1.54

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2.27ct Green Peridot, Cushion, VS
Peridot Product Video (437916)

2.27ct Green Peridot, Cushion, VS

8.2 x 7.1 mm

$ 87.05

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

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

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 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
→ View All GemSelect Reviews on Bizrate
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