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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
Single
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23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (382735)

23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent

19.5 x 15.6 mm

$ 405.94

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14.30ctw Black Spinel, Round, Opaque

14.30ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 47.00

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1.29ct Violet Spinel, Cushion, VVS-VS

1.29ct Violet Spinel, Cushion, VVS-VS

6.7 x 5.5 mm

$ 84.80

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11.89ct Blue Aquamarine, Baguette, VVS
Aquamarine Product Video (450372)

11.89ct Blue Aquamarine, Baguette, VVS

16.8 x 9.9 mm

$ 3,256.67

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1.54ct Yellow Diamond, Round, SI
Diamond Product Video (378641)

1.54ct Yellow Diamond, Round, SI

7 mm (calibrated)

$ 4,386.78

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0.61ct Pink Spinel, Cushion, SI-I1
Spinel Product Video (691805)

0.61ct Pink Spinel, Cushion, SI-I1

4.8 x 4 mm

$ 415.00

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1.41ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448532)

1.41ct Purple Sapphire, Cushion, VS

7.1 x 4.6 mm

$ 744.59

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2.89ct Pink Morganite, Trillion, Transparent

2.89ct Pink Morganite, Trillion, Transparent

9 x 9 mm (calibrated)

$ 26.39

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1.50ct Yellow Diamond, Round, SI
Diamond Product Video (378642)

1.50ct Yellow Diamond, Round, SI

7 mm (calibrated)

$ 4,272.84

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3.80ct Orange Imperial Topaz, Pear Shape, VVS
Imperial Topaz Product Video (346658)

3.80ct Orange Imperial Topaz, Pear Shape, VVS

15.6 x 7.1 mm

$ 2,331.44

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13.46ctw Black Spinel, Heart, Opaque

13.46ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 73.74

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0.58ct Pink Spinel, Oval, VS
Spinel Product Video (714549)

0.58ct Pink Spinel, Oval, VS

4.6 x 4 mm

$ 962.80

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23.57ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (486948)

23.57ct Blue Aquamarine, Emerald Cut, VVS

30.7 x 9.5 mm

$ 3,521.36

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0.46ctw Brown Diamond, Round, VS
Diamond Product Video (564572)

0.46ctw Brown Diamond, Round, VS

4 mm (calibrated)

$ 699.81

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0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.6 x 2.9 mm

$ 16.43

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1.06ct Purple Spinel, Pear Shape, SI

1.06ct Purple Spinel, Pear Shape, SI

7.8 x 5.4 mm

$ 113.24

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0.58ct White Topaz, Square, VVS-VS
Topaz Product Video (636248)

0.58ct White Topaz, Square, VVS-VS

4.6 x 4.6 mm

$ 3.36

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1.15ct Brown Diamond, Cushion, VS-SI
Diamond Product Video (460448)

1.15ct Brown Diamond, Cushion, VS-SI

6.3 x 5.6 mm

$ 2,645.87

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1.69ct Pink Morganite, Oval, VS

1.69ct Pink Morganite, Oval, VS

9 x 7 mm (calibrated)

$ 117.83

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25.34ctw Black Spinel, Baguette, Opaque
Spinel Product Video (372542)

25.34ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 199.33

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4.80ct Pink Morganite, Oval, Transparent

4.80ct Pink Morganite, Oval, Transparent

17.4 x 8.7 mm

$ 55.17

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1.05ct Violet Spinel, Baguette, VS

1.05ct Violet Spinel, Baguette, VS

7.6 x 4.9 mm

$ 37.55

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3.45ctw Brown Diamond, Square, VS-SI
Diamond Product Video (460460)

3.45ctw Brown Diamond, Square, VS-SI

6.8 x 6.6 mm

$ 7,937.62

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0.53ctw White Diamond, Heart, VVS
Diamond Product Video (685658)

0.53ctw White Diamond, Heart, VVS

2.9 x 2.6 mm

$ 2,159.34

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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 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

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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