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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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13.22ct Green Maw-Sit-Sit, Round, Opaque

13.22ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 40.84

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4.16ct Red Sunstone, Oval, Translucent

4.16ct Red Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 17.26

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7.34ct Brown Smoky Quartz, Emerald Cut, VVS

7.34ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 40.21

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1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 22.31

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0.27ct Violet Iolite, Emerald Cut, VS-SI

0.27ct Violet Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 10.76

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25.59ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

25.59ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

25 x 17.4 mm

$ 25.49

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1.73ctw Green Demantoid Garnet, Oval, VS

1.73ctw Green Demantoid Garnet, Oval, VS

5.3 x 4.2 mm

$ 189.54

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13.06ct Green Bloodstone, Cushion, Opaque

13.06ct Green Bloodstone, Cushion, Opaque

13.2 x 10.2 mm

$ 28.62

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0.71ct Orange Fire Opal, Oval, Translucent

0.71ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 16.21

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1.18ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

1.18ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

5.3 x 5.1 mm

$ 35.26

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14.31ctw Violet Amethyst, Oval, Transparent

14.31ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 78.39

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27.85ctw Black Spinel, Baguette, Opaque

27.85ctw Black Spinel, Baguette, Opaque

20.2 x 10 mm

$ 83.22

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11.07ctw Blue Chalcedony, Oval, Translucent

11.07ctw Blue Chalcedony, Oval, Translucent

14 x 10 mm (calibrated)

$ 9.21

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1.05ct Orange Sunstone, Oval, Translucent

1.05ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.32

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2.23ctw Orange Sunstone, Oval, Translucent

2.23ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 17.10

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1.52ct Purple Spinel, Cushion, VS

1.52ct Purple Spinel, Cushion, VS

6.5 x 6.2 mm

$ 82.31

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6.51ctw Pink Strawberry Quartz, Oval, Transparent

6.51ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 48.82

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2.33ct White Moonstone, Oval, Transparent

2.33ct White Moonstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.42

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0.61ct Yellow Color-Change Diaspore, Cushion, VS

0.61ct Yellow Color-Change Diaspore, Cushion, VS

6 x 4.6 mm

$ 21.38

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29.01ct Violet Charoite, Pear Shape, Opaque

29.01ct Violet Charoite, Pear Shape, Opaque

32.5 x 18.5 mm

$ 47.97

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1.90ct Yellow Citrine, Baguette, VS

1.90ct Yellow Citrine, Baguette, VS

9.8 x 5.2 mm

$ 14.57

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2.03ct Orange Hessonite Garnet, Cushion, SI

2.03ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 38.33

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0.96ct Orange Hessonite Garnet, Cushion, SI

0.96ct Orange Hessonite Garnet, Cushion, SI

5 x 5 mm (calibrated)

$ 18.93

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4.14ctw Multicolor Spectrolite, Oval, Opaque

4.14ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.51

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 -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername 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

the selection is good as are the prices

Posted By Old man 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image