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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
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Golden Natural Untreated Gemstones
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Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
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Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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0.73ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.73ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.8 x 3.8 mm

$ 151.48

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2.69ctw White Topaz, Cushion, VVS-VS

2.69ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 14.74

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0.98ct Yellow Beryl, Trillion, VS

0.98ct Yellow Beryl, Trillion, VS

7 x 7 mm (calibrated)

$ 23.42

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1.97ctw Multicolor Andalusite, Oval, VS

1.97ctw Multicolor Andalusite, Oval, VS

5 x 3.2 mm

$ 105.24

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0.92ct Pink Morganite, Pear Shape, VVS-VS

0.92ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 5.1 mm

$ 80.63

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1.00ct Violet Spinel, Oval, VS-SI

1.00ct Violet Spinel, Oval, VS-SI

6.9 x 5.7 mm

$ 103.02

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1.07ct Purple Sapphire, Cushion, VS
Sapphire Product Video (447841)

1.07ct Purple Sapphire, Cushion, VS

5.9 x 5.2 mm

$ 564.27

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3.27ct Yellow Beryl, Oval, VVS

3.27ct Yellow Beryl, Oval, VVS

11 x 9 mm (calibrated)

$ 71.65

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0.16ctw White Diamond, Round, VVS-VS
Diamond Product Video (687977)

0.16ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 264.27

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1.23ct Purple Spinel, Cushion, VVS-VS

1.23ct Purple Spinel, Cushion, VVS-VS

6.4 x 5.7 mm

$ 122.51

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5.52ct Pink Morganite, Oval, Translucent

5.52ct Pink Morganite, Oval, Translucent

13.6 x 10.1 mm

$ 54.98

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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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2.49ct Brown Diamond, Pear Shape, SI
Diamond Product Video (382045)

2.49ct Brown Diamond, Pear Shape, SI

7.9 x 7.6 mm

$ 4,652.76

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0.06ct Black Diamond, Square, Opaque

0.06ct Black Diamond, Square, Opaque

1.9 x 1.9 mm

$ 29.88

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4.71ctw White Topaz, Cushion, VS

4.71ctw White Topaz, Cushion, VS

4.5 x 4.5 mm

$ 25.80

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.2 mm (calibrated)

$ 17.11

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1.31ct Purple Spinel, Cushion, VVS-VS

1.31ct Purple Spinel, Cushion, VVS-VS

6.4 x 6.2 mm

$ 103.34

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0.59ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.59ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.8 x 4.5 mm

$ 122.43

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0.81ct Purple Spinel, Oval, VVS-VS

0.81ct Purple Spinel, Oval, VVS-VS

5.7 x 5 mm

$ 67.23

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1.04ct Yellow Chrysoberyl, Oval, VS
Chrysoberyl Product Video (366385)

1.04ct Yellow Chrysoberyl, Oval, VS

6.7 x 5.6 mm

$ 101.06

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0.08ct White Diamond, Round, VS-SI
Diamond Product Video (723727)

0.08ct White Diamond, Round, VS-SI

2.6 mm (calibrated)

$ 145.35

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0.23ct Pink Morganite, Round, VVS-VS

0.23ct Pink Morganite, Round, VVS-VS

4.5 mm (calibrated)

$ 9.55

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0.90ct Violet Spinel, Oval, VS

0.90ct Violet Spinel, Oval, VS

6.4 x 5.2 mm

$ 84.28

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2.13ctw Yellow Beryl, Oval, VS

2.13ctw Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 42.43

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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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