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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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0.88ct White Sillimanite Cat'S Eye, Oval, Transparent

0.88ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 2.75

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0.77ct Purple Spinel, Cushion, VVS-VS

0.77ct Purple Spinel, Cushion, VVS-VS

5.5 x 5.4 mm

$ 53.68

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0.68ct Yellow Zircon, Oval, VVS-VS

0.68ct Yellow Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 16.93

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4.67ct Yellow Citrine, Oval, VVS-VS

4.67ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 28.04

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26.08ct Multicolor Jasper, Oval, Opaque

26.08ct Multicolor Jasper, Oval, Opaque

31.3 x 21.1 mm

$ 15.70

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2.20ctw Red Pyrope Garnet, Marquise, VVS-VS

2.20ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 19.28

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38.32ct Violet Amethyst, Cushion, VVS-VS

38.32ct Violet Amethyst, Cushion, VVS-VS

20 x 20 mm (calibrated)

$ 254.44

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5.10ctw Brown Moonstone, Flower Cut, Translucent

5.10ctw Brown Moonstone, Flower Cut, Translucent

7.7 x 7.5 mm

$ 22.35

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4.80ct Violet Amethyst, Pear Shape, VVS

4.80ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 31.56

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15.69ct Violet Amethyst, Flower Cut, Translucent

15.69ct Violet Amethyst, Flower Cut, Translucent

17.5 x 16.5 mm

$ 51.58

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11.47ct White Dendritic Agate, Pear Shape, Opaque

11.47ct White Dendritic Agate, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 9.15

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1.00ct Green Tourmaline, Baguette, VVS

1.00ct Green Tourmaline, Baguette, VVS

12.2 x 3 mm

$ 34.86

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25.76ct Brown Moonstone, Oval, Opaque

25.76ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 42.33

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46.88ct Green Malachite, Oval, Opaque

46.88ct Green Malachite, Oval, Opaque

29 x 18.9 mm

$ 29.96

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13.67ct Multicolor Ruby-Zoisite, Baguette, Opaque

13.67ct Multicolor Ruby-Zoisite, Baguette, Opaque

12 x 10 mm (calibrated)

$ 29.95

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1.24ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.24ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5 mm (calibrated)

$ 63.85

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4.02ct Yellow Citrine, Oval, VVS

4.02ct Yellow Citrine, Oval, VVS

12.6 x 8.6 mm

$ 26.43

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1.06ct Purple Spinel, Cushion, VVS

1.06ct Purple Spinel, Cushion, VVS

6.8 x 6.1 mm

$ 105.58

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0.96ct Pink Tourmaline, Emerald Cut, VVS-VS

0.96ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 3.9 mm

$ 72.57

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0.66ct Green Tourmaline, Emerald Cut, VVS-VS

0.66ct Green Tourmaline, Emerald Cut, VVS-VS

15.8 x 2.8 mm

$ 21.70

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 23.90

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12.91ct Green Serpentine, Oval, Translucent

12.91ct Green Serpentine, Oval, Translucent

20 x 15 mm (calibrated)

$ 27.65

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1.30ct Purple Rhodolite Garnet, Oval, VS

1.30ct Purple Rhodolite Garnet, Oval, VS

7.3 x 5.9 mm

$ 45.32

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3.83ctw Red Pyrope Garnet, Square, VS

3.83ctw Red Pyrope Garnet, Square, VS

3.9 x 3.8 mm

$ 29.37

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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

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

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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