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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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1.52ctw White Rainbow Moonstone, Oval, Transparent

1.52ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 25.74

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45.90ct Multicolor Rhodonite, Oval, Opaque

45.90ct Multicolor Rhodonite, Oval, Opaque

33.7 x 24.8 mm

$ 26.51

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0.71ct Orange Sphalerite, Round, SI

0.71ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 35.36

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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0.46ct Yellow Citrine, Cushion, VVS-VS

0.46ct Yellow Citrine, Cushion, VVS-VS

5 x 5 mm (calibrated)

$ 3.44

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1.03ct Pink Tourmaline, Round, Transparent

1.03ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 17.07

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1.30ct White Rainbow Moonstone, Oval, Transparent

1.30ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 41.43

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9.54ct Multicolor Rainbow Pyrite, Fancy, Opaque

9.54ct Multicolor Rainbow Pyrite, Fancy, Opaque

18.2 x 11.1 mm

$ 28.50

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1.04ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.04ct Orange Hessonite Garnet, Pear Shape, VS-SI

7 x 5 mm (calibrated)

$ 19.37

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10.16ct Red Star Garnet, Oval, Opaque

10.16ct Red Star Garnet, Oval, Opaque

12.1 x 10.9 mm

$ 10.02

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2.24ctw Red Pyrope Garnet, Emerald Cut, VS

2.24ctw Red Pyrope Garnet, Emerald Cut, VS

5.8 x 3.8 mm

$ 15.62

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2.18ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.18ctw White Sillimanite Cat'S Eye, Oval, Translucent

6.6 x 4.5 mm

$ 7.16

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2.75ct Turquoise Grandidierite, Oval, VS-SI
Grandidierite Product Video (471966)

2.75ct Turquoise Grandidierite, Oval, VS-SI

9.5 x 8.1 mm

$ 361.55

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244.05ct Orange Spodumene, Emerald Cut, VVS

244.05ct Orange Spodumene, Emerald Cut, VVS

47.3 x 24.8 mm

$ 4,392.90

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24.47ct Multicolor Matrix Opal, Oval, Opaque

24.47ct Multicolor Matrix Opal, Oval, Opaque

31.6 x 22.5 mm

$ 41.43

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0.67ct Yellow Citrine, Heart, VVS-VS

0.67ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 4.67

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2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.15

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2.06ct Yellow Beryl, Round, VVS-VS

2.06ct Yellow Beryl, Round, VVS-VS

8 mm (calibrated)

$ 45.14

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4.51ct Yellow Citrine, Oval, VS

4.51ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 24.71

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10.11ct Green Prehnite, Fancy, Translucent

10.11ct Green Prehnite, Fancy, Translucent

18.3 x 12 mm

$ 16.62

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1.52ct Yellow Citrine, Trillion, VVS-VS

1.52ct Yellow Citrine, Trillion, VVS-VS

8.5 x 8.4 mm

$ 9.41

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3.06ctw Yellow Citrine, Oval, VVS-VS

3.06ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 16.77

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4.73ct Pink Strawberry Quartz, Round, Translucent

4.73ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 36.27

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1.78ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

1.78ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

6.3 x 4.7 mm

$ 5.62

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 -> 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 -> 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

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I enjoyed the enormous amount of knowledge on your site. It helped me choose the gems I purchased.

Posted By Merrigold in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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
→ View All GemSelect Reviews on Bizrate
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