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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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1.23ct Purple Spinel, Cushion, VS

1.23ct Purple Spinel, Cushion, VS

6.5 x 6.1 mm

$ 104.46

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0.88ctw Orange Citrine, Trillion, VVS-VS

0.88ctw Orange Citrine, Trillion, VVS-VS

5.3 x 5.2 mm

$ 7.30

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4.96ct Pink Kunzite, Fancy, VVS-VS

4.96ct Pink Kunzite, Fancy, VVS-VS

11.6 x 8.9 mm

$ 130.92

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36.06ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501553)

36.06ctw White Quartz, Pear Shape, Transparent

33.7 x 13.6 mm

$ 118.52

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32.84ct Gray Obsidian, Cushion, Opaque

32.84ct Gray Obsidian, Cushion, Opaque

22.6 x 23.9 mm

$ 25.90

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13.48ct Multicolor Agate, Round, Opaque

13.48ct Multicolor Agate, Round, Opaque

14 mm (calibrated)

$ 12.76

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12.95ctw Black Spinel, Round, Opaque

12.95ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 42.57

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27.23ct Multicolor Feather Pyrite, Oval, Opaque

27.23ct Multicolor Feather Pyrite, Oval, Opaque

28.5 x 19.8 mm

$ 21.25

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8.20ctw Black Spinel, Round, Opaque

8.20ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 31.44

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3.24ctw White Rainbow Moonstone, Square, Transparent

3.24ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 50.29

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2.33ct Green Peridot, Cushion, VS

2.33ct Green Peridot, Cushion, VS

7.9 x 7.2 mm

$ 89.35

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5.30ct Violet Amethyst, Pear Shape, VS

5.30ct Violet Amethyst, Pear Shape, VS

14 x 10 mm (calibrated)

$ 38.50

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1.36ct Brown Smoky Quartz, Baguette, VVS

1.36ct Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 9.48

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9.88ctw Black Spinel, Round, Opaque

9.88ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 37.89

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16.54ct White Howlite, Pear Shape, Opaque

16.54ct White Howlite, Pear Shape, Opaque

22.2 x 18.2 mm

$ 7.74

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21.50ct Violet Amethyst, Emerald Cut, VVS

21.50ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 149.90

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27.55ct Violet Lepidolite, Fancy, Opaque

27.55ct Violet Lepidolite, Fancy, Opaque

38.5 x 9.5 mm

$ 2.75

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2.81ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346278)

2.81ctw Green Tsavorite Garnet, Square, VVS-VS

2.3 x 2.3 mm

$ 261.69

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0.25ct Violet Iolite, Emerald Cut, VS

0.25ct Violet Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 9.96

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1.65ct Multicolor Labradorite, Pear Shape, Translucent

1.65ct Multicolor Labradorite, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 3.64

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63.14ct Multicolor Coral, Cushion, Opaque

63.14ct Multicolor Coral, Cushion, Opaque

38.3 x 32 mm

$ 92.69

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1.92ctw Yellow Golden Beryl, Oval, VS

1.92ctw Yellow Golden Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 52.59

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1.72ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.72ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 33.92

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0.52ct Yellow Citrine, Oval, VVS

0.52ct Yellow Citrine, Oval, VVS

6 x 4 mm (calibrated)

$ 3.63

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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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