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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

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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
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Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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1.97ct Yellow Citrine, Cushion, VVS-VS

1.97ct Yellow Citrine, Cushion, VVS-VS

9 x 7 mm (calibrated)

$ 15.11

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4.88ctw Red Pyrope Garnet, Marquise, VS

4.88ctw Red Pyrope Garnet, Marquise, VS

10.1 x 5.1 mm

$ 42.77

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2.86ct Green Tourmaline, Emerald Cut, VS-SI

2.86ct Green Tourmaline, Emerald Cut, VS-SI

24.9 x 3.7 mm

$ 71.21

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6.67ct Brown Smoky Quartz, Round, VVS

6.67ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 21.92

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2.82ctw Multicolor Andalusite, Oval, VS-SI

2.82ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 154.48

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4.46ct Pink Strawberry Quartz, Oval, Translucent

4.46ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 53.30

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2.90ct Yellow Citrine, Oval, VVS-VS

2.90ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.10

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15.07ctw Multicolor Jasper, Oval, Opaque

15.07ctw Multicolor Jasper, Oval, Opaque

19.8 x 12 mm

$ 9.08

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4.35ct Yellow Citrine, Oval, VS

4.35ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 23.84

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1.78ct Yellow Opal, Oval, Opaque

1.78ct Yellow Opal, Oval, Opaque

8.2 x 7.5 mm

$ 8.90

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1.23ct Pink Tourmaline, Oval, Transparent

1.23ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 20.38

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3.80ctw White Rainbow Moonstone, Square, Transparent
Rainbow Moonstone Product Video (312016)

3.80ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.2 mm

$ 58.98

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2.30ct Red Almandine Garnet, Oval, VVS-VS

2.30ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 85.91

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0.94ct Green Tourmaline, Emerald Cut, VVS

0.94ct Green Tourmaline, Emerald Cut, VVS

5.4 x 5.2 mm

$ 46.81

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2.29ct Yellow Tourmaline, Oval, Transparent

2.29ct Yellow Tourmaline, Oval, Transparent

9 x 7 mm (calibrated)

$ 39.25

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17.75ct Violet Amethyst, Pear Shape, VVS

17.75ct Violet Amethyst, Pear Shape, VVS

21.2 x 15.9 mm

$ 123.75

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0.73ct Pink Malaya Garnet, Round, VS

0.73ct Pink Malaya Garnet, Round, VS

5.2 mm

$ 31.99

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19.09ct Multicolor Agate, Oval, Opaque

19.09ct Multicolor Agate, Oval, Opaque

18.1 x 15.6 mm

$ 15.21

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44.26ct Multicolor Jasper, Oval, Opaque

44.26ct Multicolor Jasper, Oval, Opaque

43.1 x 24.1 mm

$ 48.50

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2.60ct Violet Amethyst, Trillion, VS

2.60ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.72

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4.56ct Yellow Citrine, Oval, VVS-VS

4.56ct Yellow Citrine, Oval, VVS-VS

13 x 9 mm (calibrated)

$ 34.97

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7.20ct Brown Smoky Quartz, Round, VVS-VS

7.20ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 11.84

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2.03ctw Blue Kyanite, Oval, SI

2.03ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 42.26

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10.29ct Black Tourmaline, Emerald Cut, Opaque

10.29ct Black Tourmaline, Emerald Cut, Opaque

19.8 x 9.1 mm

$ 51.24

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 -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what i needed once I worked out what I was looking for.

Posted By Dr Kenneth in August, 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

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great! Great photos

Posted By Marcia in June, 2026
Source: Bizrate
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