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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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11.68ctw Green Prehnite, Fancy, Translucent

11.68ctw Green Prehnite, Fancy, Translucent

16.1 x 10.6 mm

$ 19.19

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8.41ctw Green Prehnite, Oval, Transparent

8.41ctw Green Prehnite, Oval, Transparent

8.2 x 6.8 mm

$ 54.09

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11.31ctw Multicolor Pietersite, Pear Shape, Opaque

11.31ctw Multicolor Pietersite, Pear Shape, Opaque

19.4 x 11.3 mm

$ 42.69

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1.93ctw Green Demantoid Garnet, Oval, VS-SI

1.93ctw Green Demantoid Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 211.45

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0.67ct Yellow Citrine, Heart, VVS-VS

0.67ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.34

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3.86ct Multicolor Labradorite, Pear Shape, Translucent

3.86ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 8.53

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2.38ct White Rainbow Moonstone, Round, Transparent

2.38ct White Rainbow Moonstone, Round, Transparent

9 mm (calibrated)

$ 40.50

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13.71ct Black Nuummite, Oval, Opaque

13.71ct Black Nuummite, Oval, Opaque

17.5 x 13.8 mm

$ 59.63

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14.39ct Multicolor Agate, Fancy, Translucent
Agate Product Video (745473)

14.39ct Multicolor Agate, Fancy, Translucent

16.7 x 9.1 mm

$ 25.20

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1.05ct Blue Kyanite, Oval, VS-SI

1.05ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 23.01

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0.87ct Orange Fire Opal, Oval, Transparent

0.87ct Orange Fire Opal, Oval, Transparent

8.8 x 6.6 mm

$ 25.27

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2.37ct Yellow Sphene, Oval, Transparent

2.37ct Yellow Sphene, Oval, Transparent

8.6 x 7 mm

$ 11.80

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20.09ct Brown Smoky Quartz, Fancy, Transparent

20.09ct Brown Smoky Quartz, Fancy, Transparent

35.1 x 19.1 mm

$ 33.02

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2.71ct Violet Amethyst, Trillion, VS

2.71ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 18.89

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3.01ctw White Rainbow Moonstone, Square, Transparent

3.01ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 56.07

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1.22ct Orange Hessonite Garnet, Pear Shape, SI

1.22ct Orange Hessonite Garnet, Pear Shape, SI

8 x 6 mm (calibrated)

$ 24.30

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9.78ctw Black Star Diopside, Oval, Opaque

9.78ctw Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 40.59

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1.60ct Orange Zircon, Round, VVS-VS

1.60ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 35.06

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2.85ctw White Rainbow Moonstone, Square, Transparent

2.85ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 53.30

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0.74ct Yellow Color-Change Diaspore, Cushion, VS

0.74ct Yellow Color-Change Diaspore, Cushion, VS

5.8 x 4.7 mm

$ 39.06

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7.87ctw Yellow Citrine, Oval, VS

7.87ctw Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 49.15

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4.90ct Orange Sunstone, Oval, Translucent

4.90ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 29.15

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12.46ct Blue Chalcedony, Flower Cut, Translucent

12.46ct Blue Chalcedony, Flower Cut, Translucent

16.9 x 16.9 mm

$ 13.65

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1.98ct Green Tourmaline, Emerald Cut, VS

1.98ct Green Tourmaline, Emerald Cut, VS

16.9 x 3.7 mm

$ 71.60

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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
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

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 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
→ View All GemSelect Reviews on Bizrate
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