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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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0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 26.15

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2.74ct Violet Amethyst, Trillion, VVS-VS

2.74ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.11

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0.78ct Green Tourmaline, Emerald Cut, VS

0.78ct Green Tourmaline, Emerald Cut, VS

7 x 4.1 mm

$ 19.42

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12.43ct Multicolor Bloodstone, Marquise, Opaque

12.43ct Multicolor Bloodstone, Marquise, Opaque

20.9 x 9.7 mm

$ 24.76

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2.27ct Orange Hessonite Garnet, Cushion, VS-SI

2.27ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 40.69

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1.86ct Green Sphene, Oval, Transparent

1.86ct Green Sphene, Oval, Transparent

7.6 x 6.8 mm

$ 9.26

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1.84ct White Rainbow Moonstone, Oval, Transparent

1.84ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 31.32

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1.25ct Pink Morganite, Round, VS

1.25ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 48.56

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5.11ctw Orange Moonstone, Cushion, Translucent

5.11ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 10.18

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0.63ct Purple Spinel, Cushion, VVS-VS

0.63ct Purple Spinel, Cushion, VVS-VS

4.8 x 4.5 mm

$ 43.92

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4.59ct Violet Amethyst, Pear Shape, VVS

4.59ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 33.33

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5.81ct Brown Tiger'S Eye, Cushion, Opaque

5.81ct Brown Tiger'S Eye, Cushion, Opaque

10 x 10 mm (calibrated)

$ 5.79

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1.91ct Green Tourmaline, Emerald Cut, VVS-VS

1.91ct Green Tourmaline, Emerald Cut, VVS-VS

20.4 x 3.5 mm

$ 50.22

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0.76ct Purple Spinel, Round, VS

0.76ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 41.63

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3.68ct Yellow Cat'S Eye Apatite, Oval, Translucent

3.68ct Yellow Cat'S Eye Apatite, Oval, Translucent

9.3 x 7.5 mm

$ 28.23

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5.33ctw Yellow Moonstone, Square, Translucent

5.33ctw Yellow Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 10.67

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2.13ct Orange Sunstone, Round, Transparent

2.13ct Orange Sunstone, Round, Transparent

9 mm (calibrated)

$ 12.74

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2.77ct Purple Tourmaline, Oval, Transparent
Tourmaline Product Video (627862)

2.77ct Purple Tourmaline, Oval, Transparent

10 x 8 mm (calibrated)

$ 82.77

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2.91ctw Blue Kyanite, Oval, SI

2.91ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 60.57

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4.29ctw Multicolor Spectrolite, Oval, Opaque

4.29ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.21

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1.52ct Green Sphene, Oval, Transparent

1.52ct Green Sphene, Oval, Transparent

6.8 x 6.5 mm

$ 7.57

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15.42ct Gray Jadeite, Oval, Translucent

15.42ct Gray Jadeite, Oval, Translucent

19.3 x 12.6 mm

$ 25.34

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0.82ct Orange Zircon, Oval, VVS

0.82ct Orange Zircon, Oval, VVS

5.9 x 4.9 mm

$ 12.25

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24.95ct Multicolor Jasper, Cushion, Opaque

24.95ct Multicolor Jasper, Cushion, Opaque

27 x 20 mm (calibrated)

$ 17.22

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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 -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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