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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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9.83ctw Multicolor Pietersite, Oval, Opaque

9.83ctw Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 43.08

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8.50ct Multicolor Fire Agate, Fancy, Opaque

8.50ct Multicolor Fire Agate, Fancy, Opaque

18.8 x 10.5 mm

$ 66.68

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4.50ct Red Rhodolite Garnet, Heart, VVS-VS
Rhodolite Garnet Product Video (746071)

4.50ct Red Rhodolite Garnet, Heart, VVS-VS

11 x 9 mm (calibrated)

$ 186.75

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2.20ct Green Tourmaline, Emerald Cut, VS

2.20ct Green Tourmaline, Emerald Cut, VS

17.6 x 4.7 mm

$ 60.26

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29.31ct Green Bloodstone, Oval, Opaque

29.31ct Green Bloodstone, Oval, Opaque

19.2 x 16.1 mm

$ 58.38

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4.69ct Multicolor Opal, Oval, Transparent

4.69ct Multicolor Opal, Oval, Transparent

14.3 x 10.5 mm

$ 117.91

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1.33ct Yellow Sillimanite, Oval, VS

1.33ct Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 51.00

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7.39ct Yellow Rutile Quartz, Pear Shape, Transparent

7.39ct Yellow Rutile Quartz, Pear Shape, Transparent

15.8 x 10.4 mm

$ 31.22

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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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1.40ct Multicolor Opal, Oval, Transparent

1.40ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 54.23

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6.38ct Yellow Cat'S Eye Opal, Oval, Opaque

6.38ct Yellow Cat'S Eye Opal, Oval, Opaque

14.3 x 10.9 mm

$ 19.07

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1.17ct Orange Hessonite Garnet, Square, VS-SI

1.17ct Orange Hessonite Garnet, Square, VS-SI

6 x 6 mm (calibrated)

$ 19.62

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1.36ct White Sillimanite Cat'S Eye, Oval, Transparent

1.36ct White Sillimanite Cat'S Eye, Oval, Transparent

8 x 5 mm (calibrated)

$ 4.25

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6.65ct Gray Quartz Cat'S Eye, Oval, Opaque

6.65ct Gray Quartz Cat'S Eye, Oval, Opaque

12.6 x 10 mm

$ 21.86

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4.83ct Green Jade, Oval, Opaque

4.83ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.62

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0.44ct Green Kornerupine, Baguette, VS

0.44ct Green Kornerupine, Baguette, VS

5.4 x 3.8 mm

$ 16.87

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0.90ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.90ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 4.3 mm

$ 2.95

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4.31ctw Yellow Citrine, Oval, VVS-VS

4.31ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.61

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6.26ctw Pink Strawberry Quartz, Oval, Translucent

6.26ctw Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 48.01

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37.02ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501548)

37.02ctw White Quartz, Pear Shape, Transparent

37.5 x 13.1 mm

$ 121.68

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1.29ct Orange Sunstone, Oval, Translucent

1.29ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 21.36

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40.97ct Gray Hematite, Round, Opaque

40.97ct Gray Hematite, Round, Opaque

21.7 mm

$ 39.95

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25.21ctw Multicolor Jasper, Sphere / Ball, Opaque

25.21ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 27.62

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3.58ctw Yellow Citrine, Round, VVS-VS

3.58ctw Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 28.53

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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

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

Could not get it to work 25 times.

Posted By Dock in July, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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