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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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1.53ct Orange Hessonite Garnet, Emerald Cut, VS

1.53ct Orange Hessonite Garnet, Emerald Cut, VS

6.3 x 6.2 mm

$ 30.17

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15.32ct White Rainbow Moonstone, Oval, Transparent

15.32ct White Rainbow Moonstone, Oval, Transparent

22.9 x 14.4 mm

$ 122.07

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14.47ct Multicolor Pietersite, Baguette, Opaque

14.47ct Multicolor Pietersite, Baguette, Opaque

25.4 x 10.1 mm

$ 48.04

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1.18ctw Orange Citrine, Marquise, VS

1.18ctw Orange Citrine, Marquise, VS

8 x 3.9 mm

$ 6.47

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5.07ct Brown Rutile Quartz, Round, Transparent

5.07ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 12.72

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27.18ctw Multicolor Fossil Coral, Cushion, Opaque

27.18ctw Multicolor Fossil Coral, Cushion, Opaque

19.8 x 14.2 mm

$ 35.14

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1.54ct Purple Spinel, Cushion, VVS-VS

1.54ct Purple Spinel, Cushion, VVS-VS

7 x 6.7 mm

$ 153.38

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1.33ct Pink Morganite, Round, VS

1.33ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 51.66

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17.98ct Violet Amethyst, Pear Shape, VVS

17.98ct Violet Amethyst, Pear Shape, VVS

21.2 x 16.1 mm

$ 125.35

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0.84ct Orange Zircon, Oval, VVS

0.84ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 12.55

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5.97ctw Brown Tiger'S Eye, Oval, Opaque

5.97ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 5.94

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1.36ct Green Sphene, Oval, Transparent

1.36ct Green Sphene, Oval, Transparent

6.6 x 5.8 mm

$ 7.45

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1.25ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.25ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6.6 x 5 mm

$ 20.55

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15.56ct Multicolor Jasper, Baguette, Opaque

15.56ct Multicolor Jasper, Baguette, Opaque

16.6 x 12.8 mm

$ 9.55

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44.83ct Multicolor Coral, Pear Shape, Opaque
Coral Product Video (491381)

44.83ct Multicolor Coral, Pear Shape, Opaque

33.8 x 32.6 mm

$ 65.82

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14.80ctw Green Amazonite, Round, Opaque

14.80ctw Green Amazonite, Round, Opaque

10 mm (calibrated)

$ 11.79

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1.90ctw Brown Kornerupine, Oval, VVS-VS

1.90ctw Brown Kornerupine, Oval, VVS-VS

5.7 x 4 mm

$ 83.27

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0.89ct Green Sphene, Oval, Transparent

0.89ct Green Sphene, Oval, Transparent

6.1 x 5.2 mm

$ 4.43

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8.88ct Brown Smoky Quartz, Round, VS

8.88ct Brown Smoky Quartz, Round, VS

15 mm (calibrated)

$ 14.59

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34.77ct Multicolor Pietersite, Oval, Translucent

34.77ct Multicolor Pietersite, Oval, Translucent

40.6 x 30.8 mm

$ 88.40

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0.76ct Blue Kyanite, Round, SI

0.76ct Blue Kyanite, Round, SI

5.2 mm

$ 18.92

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13.24ct Violet Amethyst, Cushion, VVS

13.24ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 105.49

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2.66ctw Purple Rhodolite Garnet, Oval, VS

2.66ctw Purple Rhodolite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 43.28

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3.81ctw White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (350709)

3.81ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 59.27

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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

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
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 -> 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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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