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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
Pairs
Lots
Faceted
Cabochons
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30.85ct Multicolor Labradorite, Round, Translucent

30.85ct Multicolor Labradorite, Round, Translucent

25.2 mm

$ 40.22

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33.44ct Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (679955)

33.44ct Violet Amethyst, Oval, VVS-VS

21.7 x 18.1 mm

$ 222.04

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0.84ct Multicolor Chocolate Opal, Round, Translucent

0.84ct Multicolor Chocolate Opal, Round, Translucent

8 mm (calibrated)

$ 27.61

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0.12ct Black Diamond, Square, Opaque
Diamond Product Video (677850)

0.12ct Black Diamond, Square, Opaque

2.5 x 2.4 mm

$ 50.42

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34.50ct Pink Rose Quartz, Marquise, Transparent
Rose Quartz Product Video (355079)

34.50ct Pink Rose Quartz, Marquise, Transparent

34 x 18.4 mm

$ 75.60

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0.73ct Yellow Color-Change Garnet, Emerald Cut, VS

0.73ct Yellow Color-Change Garnet, Emerald Cut, VS

7.1 x 3.5 mm

$ 79.98

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2.11ct Red Coral, Oval, Opaque
Coral Product Video (499209)

2.11ct Red Coral, Oval, Opaque

11.9 x 5 mm

$ 288.96

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2.36ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.36ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 5.1 mm

$ 9.35

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1.03ct Yellow Chrysoberyl, Pear Shape, VVS

1.03ct Yellow Chrysoberyl, Pear Shape, VVS

8.4 x 5.2 mm

$ 120.03

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20.24ct Yellow Quartz Cat'S Eye, Oval, Translucent
Quartz Cat's Eye Product Video (675354)

20.24ct Yellow Quartz Cat'S Eye, Oval, Translucent

15 x 15 mm (calibrated)

$ 412.65

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2.78ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.78ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5.1 mm

$ 9.13

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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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1.70ct Brown Diamond, Round, SI
Diamond Product Video (382092)

1.70ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 3,970.74

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40.89ct Multicolor Labradorite, Pear Shape, Opaque

40.89ct Multicolor Labradorite, Pear Shape, Opaque

29.1 x 24.6 mm

$ 44.80

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0.89ctw Multicolor Opal, Oval, Transparent

0.89ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 203.14

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52.11ct Multicolor Jasper, Oval, Translucent
Jasper Product Video (433014)

52.11ct Multicolor Jasper, Oval, Translucent

37.9 x 28.4 mm

$ 51.90

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30.31ct Gray Hematite, Baguette, Opaque

30.31ct Gray Hematite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.93

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9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 54.62

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5.85ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.85ct Brown Cat'S Eye Scapolite, Oval, Translucent

11.8 x 9 mm

$ 29.13

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22.74ct White Howlite, Sphere / Ball, Opaque

22.74ct White Howlite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 11.77

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63.54ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (344388)

63.54ct Pink Rose Quartz, Oval, Transparent

27.5 x 22.7 mm

$ 93.97

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37.39ct Multicolor Jasper, Oval, Opaque

37.39ct Multicolor Jasper, Oval, Opaque

35.4 x 25.7 mm

$ 22.53

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15.89ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (438948)

15.89ct Yellow Apatite, Emerald Cut, VS

15 x 15 mm (calibrated)

$ 609.32

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9.80ct Green Grandidierite, Pear Shape, SI-I1
Grandidierite Product Video (568864)

9.80ct Green Grandidierite, Pear Shape, SI-I1

20 x 13.2 mm

$ 440.22

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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

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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

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