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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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8.25ct Brown Rutile Quartz, Round, Transparent

8.25ct Brown Rutile Quartz, Round, Transparent

14 mm (calibrated)

$ 20.70

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16.97ct Turquoise Amazonite, Pear Shape, Opaque

16.97ct Turquoise Amazonite, Pear Shape, Opaque

18.6 x 17.6 mm

$ 18.59

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20.48ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (650671)

20.48ct Multicolor Pietersite, Oval, Opaque

28.2 x 19.6 mm

$ 39.95

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9.84ct Blue Larimar, Oval, Opaque

9.84ct Blue Larimar, Oval, Opaque

16 x 12 mm (calibrated)

$ 97.03

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47.70ct Black Obsidian, Cushion, Opaque

47.70ct Black Obsidian, Cushion, Opaque

30.6 x 24.1 mm

$ 52.26

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13.86ct Yellow Apatite, Oval, VS
Apatite Product Video (398363)

13.86ct Yellow Apatite, Oval, VS

16.3 x 14.3 mm

$ 722.95

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4.38ct Multicolor Opal, Trillion, Translucent

4.38ct Multicolor Opal, Trillion, Translucent

12.5 x 12.3 mm

$ 109.06

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30.74ct Brown Moonstone, Oval, Translucent

30.74ct Brown Moonstone, Oval, Translucent

25 x 18.9 mm

$ 50.51

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14.67ct Pink Rose Quartz, Emerald Cut, Transparent

14.67ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 80.37

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32.34ctw Multicolor Labradorite, Oval, Translucent

32.34ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 70.87

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0.86ct Orange Sphalerite, Trillion, SI-I1

0.86ct Orange Sphalerite, Trillion, SI-I1

5.8 x 5.6 mm

$ 42.83

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0.49ct Green Demantoid Garnet, Oval, VS-SI

0.49ct Green Demantoid Garnet, Oval, VS-SI

5.1 x 4.1 mm

$ 134.21

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5.81ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.81ct Brown Cat'S Eye Scapolite, Oval, Translucent

11.5 x 9.3 mm

$ 31.83

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31.95ctw Multicolor Fossil Coral, Cushion, Opaque

31.95ctw Multicolor Fossil Coral, Cushion, Opaque

22.3 x 11.5 mm

$ 57.06

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8.13ct Green Prehnite, Fancy, Transparent

8.13ct Green Prehnite, Fancy, Transparent

18.1 x 16.9 mm

$ 13.18

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10.80ct Pink Morganite, Pear Shape, Translucent
Morganite Product Video (604848)

10.80ct Pink Morganite, Pear Shape, Translucent

20.1 x 12.7 mm

$ 118.32

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96.70ct Multicolor Agate, Oval, Opaque
Agate Product Video (692955)

96.70ct Multicolor Agate, Oval, Opaque

32.3 x 27.5 mm

$ 77.05

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25.96ct Multicolor Pietersite, Oval, Opaque

25.96ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 113.76

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23.50ct Gray Hematite, Heart, Opaque

23.50ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 51.49

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9.86ct Multicolor Fire Agate, Fancy, Opaque

9.86ct Multicolor Fire Agate, Fancy, Opaque

16.9 x 12.3 mm

$ 77.35

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0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 153.38

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11.09ct Purple Kunzite, Trillion, VS
Kunzite Product Video (409216)

11.09ct Purple Kunzite, Trillion, VS

16.7 x 13 mm

$ 313.23

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0.21ctw White Diamond, Round, VVS-VS
Diamond Product Video (565089)

0.21ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 381.55

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32.94ctw Multicolor Labradorite, Oval, Translucent

32.94ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 65.62

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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 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 love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

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 -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate
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