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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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8.42ct Multicolor Boulder Opal, Oval, Opaque

8.42ct Multicolor Boulder Opal, Oval, Opaque

18.8 x 13.8 mm

$ 58.71

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4.43ct Brown Smoky Quartz, Round, VVS-VS

4.43ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 7.29

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7.96ct Green Malachite, Oval, Opaque

7.96ct Green Malachite, Oval, Opaque

12 x 10 mm (calibrated)

$ 7.93

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2.93ctw Yellow Citrine, Emerald Cut, VVS-VS

2.93ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.36

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0.92ct Orange Hessonite Garnet, Round, VS

0.92ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 14.05

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0.88ctw Green Demantoid Garnet, Oval, VS-SI

0.88ctw Green Demantoid Garnet, Oval, VS-SI

4.3 x 3.6 mm

$ 96.41

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0.66ct Orange Spessartite Garnet, Oval, SI

0.66ct Orange Spessartite Garnet, Oval, SI

6.2 x 4.4 mm

$ 22.35

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1.04ct Purple Spinel, Cushion, VS

1.04ct Purple Spinel, Cushion, VS

6.3 x 5.7 mm

$ 180.94

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17.05ctw Brown Tiger'S Eye, Cushion, Opaque

17.05ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 18.68

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1.13ct Yellow Citrine, Round, VS

1.13ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 7.50

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1.22ct Multicolor Opal, Oval, Transparent

1.22ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 25.32

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3.00ct White Rainbow Moonstone, Oval, Transparent

3.00ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 98.64

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0.86ct Yellow Citrine, Oval, Transparent

0.86ct Yellow Citrine, Oval, Transparent

10.2 x 4.1 mm

$ 5.99

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16.35ct Multicolor Bloodstone, Pear Shape, Opaque

16.35ct Multicolor Bloodstone, Pear Shape, Opaque

20.5 x 12.4 mm

$ 32.57

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1.80ctw Orange Sunstone, Oval, Translucent

1.80ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.55

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0.75ct Green Peridot, Oval, VS

0.75ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.23

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27.96ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque

27.96ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque

33.4 x 21.1 mm

$ 22.56

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2.28ct Orange Hessonite Garnet, Oval, VVS-VS

2.28ct Orange Hessonite Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 43.14

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5.76ct Multicolor Fire Agate, Trillion, Translucent

5.76ct Multicolor Fire Agate, Trillion, Translucent

17.7 x 10.6 mm

$ 49.54

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17.13ctw Multicolor Fossil Coral, Pear Shape, Opaque

17.13ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.4 x 11.3 mm

$ 18.77

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9.97ct Brown Smoky Quartz, Round, VVS

9.97ct Brown Smoky Quartz, Round, VVS

15 mm (calibrated)

$ 40.20

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4.49ct Violet Amethyst, Pear Shape, VVS

4.49ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 34.43

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3.82ctw Orange Citrine, Round, VS

3.82ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 31.71

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61.71ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (758651)

61.71ct Pink Kunzite, Emerald Cut, VS

25 x 16 mm

$ 1,234.20

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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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 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

Fairly good selection of calibrated gems but would like to see more in various sizes, esp rounds,

Posted By Eddie in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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 -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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