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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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1.22ct Yellow Color-Change Diaspore, Cushion, VS

1.22ct Yellow Color-Change Diaspore, Cushion, VS

10.8 x 4.5 mm

$ 42.77

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2.74ct Violet Amethyst, Trillion, VVS-VS

2.74ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 16.38

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1.65ct Orange Hessonite Garnet, Oval, VS

1.65ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.6 mm

$ 32.54

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1.20ct Brown Tiger'S Eye, Marquise, Opaque

1.20ct Brown Tiger'S Eye, Marquise, Opaque

10 x 5 mm (calibrated)

$ 1.55

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6.02ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471872)

6.02ct Turquoise Grandidierite, Oval, Translucent

13 x 9 mm (calibrated)

$ 986.04

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2.37ct Green Peridot, Oval, VS

2.37ct Green Peridot, Oval, VS

8.7 x 7.6 mm

$ 89.61

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21.22ct Multicolor Jasper, Baguette, Opaque

21.22ct Multicolor Jasper, Baguette, Opaque

22.1 x 16.7 mm

$ 46.50

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4.31ct Black Star Diopside, Oval, Opaque

4.31ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 21.46

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4.44ct Red Rhodolite Garnet, Heart, VS
Rhodolite Garnet Product Video (746077)

4.44ct Red Rhodolite Garnet, Heart, VS

10.5 x 9.5 mm

$ 184.26

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1.83ct Orange Hessonite Garnet, Cushion, VVS-VS

1.83ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 36.45

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2.96ctw White Topaz, Cushion, VVS-VS

2.96ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.22

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2.30ct Multicolor Labradorite, Marquise, Translucent

2.30ct Multicolor Labradorite, Marquise, Translucent

12.3 x 6.3 mm

$ 5.09

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8.77ct Brown Smoky Quartz, Emerald Cut, VVS

8.77ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 16.33

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6.30ct Pink Morganite, Trillion, Translucent

6.30ct Pink Morganite, Trillion, Translucent

13 x 13 mm (calibrated)

$ 69.02

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2.77ctw White Rainbow Moonstone, Square, Transparent

2.77ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 43.75

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35.21ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

35.21ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

29 x 18.7 mm

$ 15.78

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11.37ct Pink Rose Quartz, Emerald Cut, Transparent

11.37ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 62.29

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0.08ct Black Diamond, Round, Opaque

0.08ct Black Diamond, Round, Opaque

2.6 mm (calibrated)

$ 27.38

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105.35ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724423)

105.35ct Violet Amethyst, Pear Shape, VVS

33.6 x 32.8 mm

$ 657.55

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71.74ct White Howlite, Pear Shape, Opaque

71.74ct White Howlite, Pear Shape, Opaque

40.8 x 31.7 mm

$ 39.30

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0.27ct Violet Iolite, Oval, VS

0.27ct Violet Iolite, Oval, VS

6 x 4 mm (calibrated)

$ 10.76

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3.47ctw Pink Strawberry Quartz, Oval, Transparent

3.47ctw Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.32

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1.01ct Blue Kyanite, Round, SI

1.01ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 25.15

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4.33ct Orange Sunstone, Oval, Translucent

4.33ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.75

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

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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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