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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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10.52ct Green Maw-Sit-Sit, Oval, Opaque

10.52ct Green Maw-Sit-Sit, Oval, Opaque

14.1 x 11 mm

$ 23.05

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2.19ct Orange Citrine, Round, VS

2.19ct Orange Citrine, Round, VS

8 mm (calibrated)

$ 18.18

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4.47ct Multicolor Rainbow Pyrite, Trillion, Opaque

4.47ct Multicolor Rainbow Pyrite, Trillion, Opaque

12 x 12 mm (calibrated)

$ 11.57

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3.67ct Green Malachite, Oval, Opaque

3.67ct Green Malachite, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.65

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2.10ct Orange Hessonite Garnet, Cushion, VS

2.10ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 41.42

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2.09ct Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (735235)

2.09ct Purple Rhodolite Garnet, Oval, VS

8.3 x 6.5 mm

$ 83.27

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3.22ctw Orange Citrine, Round, VS

3.22ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 26.73

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2.51ctw Red Pyrope Garnet, Marquise, VVS-VS

2.51ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5 mm

$ 22.00

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1.44ct White Sillimanite Cat'S Eye, Round, Transparent

1.44ct White Sillimanite Cat'S Eye, Round, Transparent

6.5 mm (calibrated)

$ 4.49

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2.03ct Orange Hessonite Garnet, Cushion, VS-SI

2.03ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 38.33

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2.33ct Green Sphene, Oval, Transparent

2.33ct Green Sphene, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.60

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0.08ct Black Diamond, Round, Opaque

0.08ct Black Diamond, Round, Opaque

2.6 mm (calibrated)

$ 38.71

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14.63ct Violet Amethyst, Oval, IF

14.63ct Violet Amethyst, Oval, IF

20 x 15 mm (calibrated)

$ 97.14

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52.30ct Violet Amethyst, Pear Shape, VVS-VS
Amethyst Product Video (753782)

52.30ct Violet Amethyst, Pear Shape, VVS-VS

29.3 x 21.3 mm

$ 523.00

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14.87ct Multicolor Quartz With Marcasite, Oval, Transparent

14.87ct Multicolor Quartz With Marcasite, Oval, Transparent

19.3 x 13.1 mm

$ 97.75

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4.68ctw Yellow Citrine, Oval, VVS-VS

4.68ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 35.90

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0.83ctw Green Peridot, Pear Shape, VVS-VS

0.83ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.27

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33.67ct Multicolor Tiger'S Eye Matrix, Round, Opaque

33.67ct Multicolor Tiger'S Eye Matrix, Round, Opaque

23.2 mm

$ 15.09

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5.53ctw Violet Amethyst, Oval, Transparent

5.53ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.30

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8.30ct Multicolor Boulder Opal, Pear Shape, Opaque

8.30ct Multicolor Boulder Opal, Pear Shape, Opaque

19.3 x 11 mm

$ 63.65

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23.13ctw Orange Sunstone, Oval, Transparent

23.13ctw Orange Sunstone, Oval, Transparent

12 x 10 mm (calibrated)

$ 134.39

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0.65ct Purple Spinel, Cushion, VS

0.65ct Purple Spinel, Cushion, VS

5.5 x 4.2 mm

$ 45.32

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3.14ct Yellow Citrine, Oval, VVS

3.14ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.90

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0.50ct Pink Morganite, Pear Shape, VVS-VS

0.50ct Pink Morganite, Pear Shape, VVS-VS

7.8 x 4.3 mm

$ 30.13

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

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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

Overall Rating -> 10 star ratings

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

Posted By Tim in January, 2026
Source: Bizrate

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 -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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