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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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6.01ct Blue Aquamarine, Emerald Cut, VS
Aquamarine Product Video (412445)

6.01ct Blue Aquamarine, Emerald Cut, VS

12.6 x 8.2 mm

$ 954.76

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27.42ct Multicolor Obsidian, Cushion, Opaque
Obsidian Product Video (523599)

27.42ct Multicolor Obsidian, Cushion, Opaque

30 x 22 mm (calibrated)

$ 23.12

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26.46ct Blue Chalcedony, Pear Shape, Opaque
Chalcedony Product Video (694293)

26.46ct Blue Chalcedony, Pear Shape, Opaque

33.4 x 17.6 mm

$ 65.89

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8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

16.2 x 13.4 mm

$ 59.96

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2.99ct Brown Cat'S Eye Scapolite, Round, Translucent

2.99ct Brown Cat'S Eye Scapolite, Round, Translucent

9.5 mm (calibrated)

$ 16.38

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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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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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34.00ct Green Maw-Sit-Sit, Round, Opaque
Maw-Sit-Sit Product Video (476802)

34.00ct Green Maw-Sit-Sit, Round, Opaque

19 mm (calibrated)

$ 101.59

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2.10ct Orange Sunstone, Round, Translucent

2.10ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 12.57

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31.44ct Multicolor Rhodochrosite, Pear Shape, Opaque
Rhodochrosite Product Video (237441)

31.44ct Multicolor Rhodochrosite, Pear Shape, Opaque

34.2 x 16.1 mm

$ 86.11

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2.02ct Red Ruby, Cushion, SI
Ruby Product Video (569416)

2.02ct Red Ruby, Cushion, SI

7 x 7 mm (calibrated)

$ 7,507.62

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8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

12.5 x 10 mm

$ 26.63

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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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32.95ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (521453)

32.95ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

34.4 x 17.3 mm

$ 216.60

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3.27ct Pink Tourmaline, Emerald Cut, VS-SI
Tourmaline Product Video (545011)

3.27ct Pink Tourmaline, Emerald Cut, VS-SI

10.7 x 6.2 mm

$ 206.00

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95.38ct Violet Amethyst, Cushion, VS
Amethyst Product Video (638587)

95.38ct Violet Amethyst, Cushion, VS

28.7 x 25.7 mm

$ 554.16

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39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

14 mm (calibrated)

$ 62.96

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13.20ct Pink Rose Quartz, Emerald Cut, Transparent

13.20ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 60.26

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5.00ctw Orange Hessonite Garnet, Emerald Cut, VS
Hessonite Garnet Product Video (391933)

5.00ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 110.00

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8.58ct Brown Smoky Quartz, Emerald Cut, VVS-VS

8.58ct Brown Smoky Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 34.59

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0.14ct Black Diamond, Square, Opaque

0.14ct Black Diamond, Square, Opaque

2.6 x 2.4 mm

$ 69.72

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18.42ct Brown Moonstone, Fancy, Translucent
Moonstone Product Video (582246)

18.42ct Brown Moonstone, Fancy, Translucent

24.7 x 16.5 mm

$ 110.19

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9.99ct Yellow Apatite, Cushion, VVS-VS
Apatite Product Video (398362)

9.99ct Yellow Apatite, Cushion, VVS-VS

17.1 x 10.5 mm

$ 473.71

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11.49ct Brown Star Moonstone, Oval, Translucent

11.49ct Brown Star Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 41.96

View Gem
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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

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 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

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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