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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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34.68ct Multicolor Agate, Round, Opaque

34.68ct Multicolor Agate, Round, Opaque

20 mm (calibrated)

$ 32.82

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1.54ctw Red Rhodolite Garnet, Square, VS

1.54ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.48

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1.81ctw Orange Sunstone, Oval, Translucent

1.81ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.62

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23.09ct Black Tourmaline, Emerald Cut, Opaque

23.09ct Black Tourmaline, Emerald Cut, Opaque

20.5 x 13 mm

$ 114.99

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14.91ctw Multicolor Jasper, Heart, Opaque

14.91ctw Multicolor Jasper, Heart, Opaque

19.5 x 12.9 mm

$ 16.33

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2.48ctw Violet Amethyst, Oval, VVS-VS

2.48ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.59

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4.25ctw Yellow Sphene, Oval, Transparent

4.25ctw Yellow Sphene, Oval, Transparent

8.1 x 6.5 mm

$ 21.17

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18.36ct Purple Ruby-Zoisite, Flower Cut, Opaque

18.36ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.8 x 14.5 mm

$ 22.31

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16.61ctw Multicolor Labradorite, Oval, Translucent

16.61ctw Multicolor Labradorite, Oval, Translucent

20 x 15 mm (calibrated)

$ 33.08

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1.19ct Purple Spinel, Cushion, VS

1.19ct Purple Spinel, Cushion, VS

6.7 x 5.5 mm

$ 83.85

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6.18ct Yellow Apatite, Oval, VS
Apatite Product Video (514430)

6.18ct Yellow Apatite, Oval, VS

12.6 x 10.7 mm

$ 270.83

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1.11ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

1.11ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.6 x 5 mm

$ 58.08

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0.23ct Violet Iolite, Round, VS-SI

0.23ct Violet Iolite, Round, VS-SI

4.2 mm

$ 9.16

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1.93ct Yellow Beryl, Round, VS

1.93ct Yellow Beryl, Round, VS

8.5 mm (calibrated)

$ 46.13

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1.03ct Purple Spinel, Cushion, VVS-VS

1.03ct Purple Spinel, Cushion, VVS-VS

6.4 x 5.9 mm

$ 153.88

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3.50ct Violet Amethyst, Oval, VS

3.50ct Violet Amethyst, Oval, VS

11.2 x 8.6 mm

$ 27.89

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16.40ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

16.40ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

23 x 16 mm

$ 16.33

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6.67ct Multicolor Pietersite, Cushion, Opaque

6.67ct Multicolor Pietersite, Cushion, Opaque

18.3 x 9 mm

$ 21.92

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2.39ct Pink Strawberry Quartz, Oval, Transparent

2.39ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 17.76

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5.37ct Multicolor Pietersite, Oval, Opaque

5.37ct Multicolor Pietersite, Oval, Opaque

13 x 9 mm (calibrated)

$ 13.00

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5.94ctw Violet Amethyst, Trillion, VS

5.94ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 47.33

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10.94ctw Brown Smoky Quartz, Round, VS

10.94ctw Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 29.97

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3.22ct Red Almandine Garnet, Pear Shape, VS

3.22ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 120.27

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14.31ct Multicolor Amethyst Geode Slice, Fancy, Transparent

14.31ct Multicolor Amethyst Geode Slice, Fancy, Transparent

20 x 15 mm (calibrated)

$ 15.25

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about 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 -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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