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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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33.18ct Multicolor Quartz With Marcasite, Marquise, Transparent

33.18ct Multicolor Quartz With Marcasite, Marquise, Transparent

43.3 x 15.1 mm

$ 181.76

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0.94ct Orange Hessonite Garnet, Cushion, VS

0.94ct Orange Hessonite Garnet, Cushion, VS

5 x 5 mm (calibrated)

$ 13.98

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4.12ctw Yellow Citrine, Square, VVS-VS

4.12ctw Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 31.59

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10.15ct Multicolor Fire Agate, Fancy, Opaque

10.15ct Multicolor Fire Agate, Fancy, Opaque

23.3 x 9.2 mm

$ 79.62

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4.90ct Yellow Apatite, Oval, VVS-VS
Apatite Product Video (514428)

4.90ct Yellow Apatite, Oval, VVS-VS

13 x 10.1 mm

$ 214.74

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3.23ct Pink Strawberry Quartz, Round, Translucent

3.23ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 19.47

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2.16ct Brown Tiger'S Eye, Oval, Opaque

2.16ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.15

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36.10ct Multicolor Jasper, Baguette, Opaque

36.10ct Multicolor Jasper, Baguette, Opaque

25 x 20.8 mm

$ 39.55

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1.16ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.16ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5 mm (calibrated)

$ 47.33

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0.61ct Red Pyrope Garnet, Heart, VVS

0.61ct Red Pyrope Garnet, Heart, VVS

5 x 5 mm (calibrated)

$ 4.86

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6.25ct Multicolor Agate, Round, Opaque

6.25ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 5.92

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1.95ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (566472)

1.95ct Pink Tourmaline, Emerald Cut, VVS-VS

9.2 x 5.2 mm

$ 106.82

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1.57ct Red Spessartite Garnet, Round, SI

1.57ct Red Spessartite Garnet, Round, SI

6.5 mm (calibrated)

$ 65.16

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10.88ctw Violet Amethyst, Cushion, VS

10.88ctw Violet Amethyst, Cushion, VS

15.1 x 9.2 mm

$ 75.85

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2.56ct Green Prehnite, Pear Shape, Transparent

2.56ct Green Prehnite, Pear Shape, Transparent

9.4 x 7.5 mm

$ 11.60

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5.73ct Multicolor Fire Agate, Oval, Opaque

5.73ct Multicolor Fire Agate, Oval, Opaque

12 x 10.7 mm

$ 44.06

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3.33ct White Moonstone, Round, Translucent

3.33ct White Moonstone, Round, Translucent

9 mm (calibrated)

$ 9.11

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7.31ct Brown Tiger'S Eye, Oval, Opaque

7.31ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 7.28

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1.76ct Yellow Sphene, Oval, Transparent

1.76ct Yellow Sphene, Oval, Transparent

7.3 x 6.5 mm

$ 9.64

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17.26ct Multicolor Pietersite, Cushion, Opaque

17.26ct Multicolor Pietersite, Cushion, Opaque

27.8 x 10.3 mm

$ 65.12

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5.46ct Yellow Citrine, Oval, VVS-VS

5.46ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.78

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5.33ctw Pink Rose Quartz, Emerald Cut, Transparent

5.33ctw Pink Rose Quartz, Emerald Cut, Transparent

8.6 x 8.5 mm

$ 29.20

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0.70ct Yellow Color-Change Diaspore, Round, VVS-VS

0.70ct Yellow Color-Change Diaspore, Round, VVS-VS

5 mm (calibrated)

$ 24.57

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6.05ct Yellow Citrine, Round, VVS

6.05ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 46.41

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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 experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 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 made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.

Posted By MMM in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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