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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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7.84ctw Orange Moonstone, Flower Cut, Translucent

7.84ctw Orange Moonstone, Flower Cut, Translucent

10 x 10 mm (calibrated)

$ 17.18

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2.01ct Green Peridot, Cushion, VS

2.01ct Green Peridot, Cushion, VS

9 x 7 mm (calibrated)

$ 78.84

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1.41ct Yellow Beryl, Trillion, VVS

1.41ct Yellow Beryl, Trillion, VVS

8.4 x 8 mm

$ 30.89

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19.45ct Violet Amethyst, Cushion, VVS

19.45ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 135.61

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8.84ct Multicolor Pietersite, Round, Opaque

8.84ct Multicolor Pietersite, Round, Opaque

15 mm (calibrated)

$ 21.40

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19.65ctw Multicolor Fossil Coral, Oval, Opaque

19.65ctw Multicolor Fossil Coral, Oval, Opaque

19 x 11.7 mm

$ 25.41

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5.80ct Multicolor Fire Agate, Fancy, Translucent

5.80ct Multicolor Fire Agate, Fancy, Translucent

13.4 x 9.8 mm

$ 49.11

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3.16ct Violet Amethyst, Trillion, VS

3.16ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 25.18

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1.04ctw Yellow Citrine, Marquise, VVS-VS

1.04ctw Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.91

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35.14ct Multicolor Jasper, Oval, Opaque

35.14ct Multicolor Jasper, Oval, Opaque

27.1 x 18.3 mm

$ 38.50

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1.41ctw Red Pyrope Garnet, Square, VS

1.41ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.81

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48.20ct Multicolor Coral, Oval, Opaque

48.20ct Multicolor Coral, Oval, Opaque

35 x 24.8 mm

$ 70.77

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1.03ct Orange Hessonite Garnet, Pear Shape, SI

1.03ct Orange Hessonite Garnet, Pear Shape, SI

8.1 x 5.7 mm

$ 22.57

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1.42ct Orange Sphalerite, Oval, SI

1.42ct Orange Sphalerite, Oval, SI

6.7 x 5.7 mm

$ 70.72

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9.35ct Violet Chalcedony, Cushion, Translucent

9.35ct Violet Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 34.92

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17.57ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.57ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.1 x 16 mm

$ 21.36

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86.75ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724424)

86.75ct Violet Amethyst, Pear Shape, VVS

37 x 23.7 mm

$ 541.46

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31.51ctw Multicolor Coral, Cushion, Opaque

31.51ctw Multicolor Coral, Cushion, Opaque

22.3 x 12.8 mm

$ 59.72

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25.41ct Multicolor Jasper, Oval, Opaque

25.41ct Multicolor Jasper, Oval, Opaque

29.1 x 16.6 mm

$ 29.23

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9.81ct Multicolor Pietersite, Trillion, Opaque
Pietersite Product Video (596428)

9.81ct Multicolor Pietersite, Trillion, Opaque

17.6 x 16.1 mm

$ 32.24

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2.25ct Orange Hessonite Garnet, Oval, VS-SI

2.25ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 39.72

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0.45ct White Rainbow Moonstone, Baguette, Transparent

0.45ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 15.69

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1.30ct Green Peridot, Oval, VS

1.30ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 11.65

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13.34ct Black Nuummite, Cushion, Opaque

13.34ct Black Nuummite, Cushion, Opaque

16.8 x 15 mm

$ 55.83

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

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