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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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2.94ct Yellow Rutile Quartz, Pear Shape, Transparent

2.94ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 7.92

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0.04ct White Diamond, Round, VVS

0.04ct White Diamond, Round, VVS

2.2 mm (calibrated)

$ 92.69

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1.67ctw Red Rhodolite Garnet, Square, VS

1.67ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 14.61

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1.30ctw Green Peridot, Oval, Transparent

1.30ctw Green Peridot, Oval, Transparent

6.1 x 4.2 mm

$ 23.31

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1.93ct Brown Tiger'S Eye, Pear Shape, Opaque

1.93ct Brown Tiger'S Eye, Pear Shape, Opaque

8 x 8 mm (calibrated)

$ 2.50

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34.87ctw Gray Hematite, Emerald Cut, Opaque

34.87ctw Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 34.00

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1.23ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.23ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.6 x 5.3 mm

$ 4.04

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1.49ctw Green Peridot, Oval, VVS-VS

1.49ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 20.77

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1.53ct Green Tourmaline, Emerald Cut, VS

1.53ct Green Tourmaline, Emerald Cut, VS

21 x 3 mm

$ 32.16

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2.17ct Orange Moonstone, Square, Translucent

2.17ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.34

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1.80ctw Green Demantoid Garnet, Round, VS-SI

1.80ctw Green Demantoid Garnet, Round, VS-SI

3.3 mm

$ 78.88

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2.18ct Orange Hessonite Garnet, Cushion, VS-SI

2.18ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 32.42

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0.63ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.63ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 3.8 mm

$ 33.26

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6.32ct Violet Amethyst, Oval, Transparent

6.32ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 20.83

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7.60ctw White Moonstone, Round, Translucent

7.60ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 20.82

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125.94ct Green Bloodstone, Square, Opaque

125.94ct Green Bloodstone, Square, Opaque

31.7 x 31.3 mm

$ 43.91

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4.77ctw Red Pyrope Garnet, Pear Shape, VVS-VS

4.77ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 36.59

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 254.36

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1.10ct Yellow Citrine, Square, VVS-VS

1.10ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 7.67

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12.66ct Multicolor Opal, Pear Shape, Translucent

12.66ct Multicolor Opal, Pear Shape, Translucent

18.4 x 13.8 mm

$ 315.23

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1.86ct Violet Amethyst, Oval, Transparent

1.86ct Violet Amethyst, Oval, Transparent

12.1 x 6 mm

$ 12.96

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35.84ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

35.84ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 78.53

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28.03ct Multicolor Boulder Opal, Pear Shape, Opaque
Boulder Opal Product Video (321922)

28.03ct Multicolor Boulder Opal, Pear Shape, Opaque

27 x 20 mm (calibrated)

$ 214.97

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0.83ct Orange Fire Opal, Oval, Translucent

0.83ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 18.95

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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

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 -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

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