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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
Single
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13.25ct Brown Smoky Quartz, Emerald Cut, VVS

13.25ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 36.30

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2.66ct Yellow Golden Beryl, Round, VVS

2.66ct Yellow Golden Beryl, Round, VVS

9 mm (calibrated)

$ 64.11

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1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

9.5 x 5.5 mm

$ 64.64

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2.78ct Orange Coral, Oval, Opaque
Coral Product Video (499196)

2.78ct Orange Coral, Oval, Opaque

12 x 5.6 mm

$ 456.87

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77.96ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (693326)

77.96ct Multicolor Jasper, Oval, Opaque

45.7 x 25.6 mm

$ 45.04

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30.59ctw Multicolor Coral, Cushion, Opaque

30.59ctw Multicolor Coral, Cushion, Opaque

18 x 13 mm (calibrated)

$ 57.98

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23.11ct White Howlite, Round, Opaque

23.11ct White Howlite, Round, Opaque

21.8 mm

$ 10.81

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1.29ct Yellow Chrysoberyl, Pear Shape, VS
Chrysoberyl Product Video (366654)

1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

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1.08ct Orange Morganite, Oval, VVS-VS

1.08ct Orange Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 54.23

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1.35ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

1.35ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

10.5 x 3.7 mm

$ 72.60

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7.18ct Turquoise Grandidierite, Pear Shape, Translucent
Grandidierite Product Video (472004)

7.18ct Turquoise Grandidierite, Pear Shape, Translucent

14 x 11.4 mm

$ 1,573.28

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0.64ct Multicolor Chocolate Opal, Round, Translucent

0.64ct Multicolor Chocolate Opal, Round, Translucent

6 mm (calibrated)

$ 17.53

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9.91ctw White Quartz Cat'S Eye, Round, Transparent

9.91ctw White Quartz Cat'S Eye, Round, Transparent

10 mm (calibrated)

$ 35.29

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0.24ctw Black Diamond, Round, Opaque

0.24ctw Black Diamond, Round, Opaque

3 mm (calibrated)

$ 114.17

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45.87ct Green Serpentine, Oval, Translucent

45.87ct Green Serpentine, Oval, Translucent

31.9 x 22 mm

$ 98.22

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1.74ct Orange Hessonite Garnet, Cushion, VVS-VS
Hessonite Garnet Product Video (644360)

1.74ct Orange Hessonite Garnet, Cushion, VVS-VS

7.7 x 7.3 mm

$ 86.65

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6.19ct Brown Tiger'S Eye, Baguette, Opaque
Tiger's Eye Product Video (656739)

6.19ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.07

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0.87ct Multicolor Opal, Round, Transparent
Opal Product Video (540981)

0.87ct Multicolor Opal, Round, Transparent

7 mm (calibrated)

$ 18.02

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13.03ct Blue Chalcedony, Pear Shape, Opaque

13.03ct Blue Chalcedony, Pear Shape, Opaque

26 x 13.7 mm

$ 27.04

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7.58ct Brown Apatite, Cushion, VS
Apatite Product Video (387572)

7.58ct Brown Apatite, Cushion, VS

12 x 12 mm (calibrated)

$ 405.51

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2.83ct Pink Tourmaline, Emerald Cut, SI

2.83ct Pink Tourmaline, Emerald Cut, SI

8.9 x 6.3 mm

$ 178.28

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6.37ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (407845)

6.37ct Yellow Apatite, Emerald Cut, VS

13.3 x 9.8 mm

$ 289.98

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2.84ct Green Peridot, Cushion, VS-SI
Peridot Product Video (334362)

2.84ct Green Peridot, Cushion, VS-SI

9.8 x 7.6 mm

$ 84.86

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25.93ctw White Rainbow Moonstone, Oval, Transparent
Rainbow Moonstone Product Video (669278)

25.93ctw White Rainbow Moonstone, Oval, Transparent

21.8 x 10.4 mm

$ 464.87

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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 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

Posted By Nik 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 -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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