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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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1.07ct Brown Color-Change Garnet, Oval, VVS-VS

1.07ct Brown Color-Change Garnet, Oval, VVS-VS

7.4 x 5.2 mm

$ 85.47

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1.05ct Brown Color-Change Garnet, Oval, VVS

1.05ct Brown Color-Change Garnet, Oval, VVS

6.3 x 5 mm

$ 83.88

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19.70ct Violet Amethyst, Cushion, VS

19.70ct Violet Amethyst, Cushion, VS

20 x 15 mm (calibrated)

$ 137.35

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4.40ctw Multicolor Spectrolite, Oval, Opaque

4.40ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.12

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0.73ct Orange Citrine, Oval, VVS-VS

0.73ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.27

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4.92ctw Violet Amethyst, Fancy, VS

4.92ctw Violet Amethyst, Fancy, VS

9.1 x 4.5 mm

$ 32.34

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4.91ct Orange Sunstone, Round, Translucent

4.91ct Orange Sunstone, Round, Translucent

12 mm (calibrated)

$ 29.97

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28.90ct Multicolor Opal, Oval, Opaque

28.90ct Multicolor Opal, Oval, Opaque

32.9 x 21.4 mm

$ 86.35

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1.64ct Brown Tiger'S Eye, Round, Opaque

1.64ct Brown Tiger'S Eye, Round, Opaque

7.5 mm (calibrated)

$ 2.12

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2.02ct Blue Kyanite, Oval, SI

2.02ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 42.05

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7.83ct Yellow Rutile Quartz, Pear Shape, Transparent

7.83ct Yellow Rutile Quartz, Pear Shape, Transparent

16.2 x 12.8 mm

$ 21.27

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48.91ct Multicolor Jasper, Oval, Opaque

48.91ct Multicolor Jasper, Oval, Opaque

42.6 x 26 mm

$ 34.30

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10.90ct Green Druzy Variscite, Fancy, Opaque

10.90ct Green Druzy Variscite, Fancy, Opaque

20.9 x 20.9 mm

$ 11.19

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1.67ct Orange Hessonite Garnet, Emerald Cut, VS

1.67ct Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 32.93

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0.57ct Red Pyrope Garnet, Heart, VVS-VS

0.57ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 4.54

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3.88ct Violet Amethyst, Pear Shape, VVS-VS

3.88ct Violet Amethyst, Pear Shape, VVS-VS

13 x 9 mm (calibrated)

$ 29.76

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6.37ctw Pink Strawberry Quartz, Oval, Transparent

6.37ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 49.76

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35.80ct White Quartz, Fancy, Transparent

35.80ct White Quartz, Fancy, Transparent

27.5 x 21.9 mm

$ 39.23

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18.04ct Brown Star Sunstone, Oval, Opaque

18.04ct Brown Star Sunstone, Oval, Opaque

18.2 x 14.8 mm

$ 149.73

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1.18ct Orange Hessonite Garnet, Square, SI

1.18ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 19.80

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3.16ctw Red Pyrope Garnet, Square, VS

3.16ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 24.24

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2.98ct Multicolor Opal, Trillion, Transparent
Opal Product Video (691103)

2.98ct Multicolor Opal, Trillion, Transparent

11.6 x 11.1 mm

$ 133.56

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0.34ct Brown Color-Change Sapphire, Emerald Cut, VVS

0.34ct Brown Color-Change Sapphire, Emerald Cut, VVS

4 x 3.4 mm

$ 28.22

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6.04ct Pink Kunzite, Emerald Cut, VVS

6.04ct Pink Kunzite, Emerald Cut, VVS

11.1 x 8.1 mm

$ 166.22

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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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
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

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
→ View All GemSelect Reviews on Bizrate
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