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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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0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.86

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1.20ct Orange Sunstone, Oval, Translucent

1.20ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.97

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1.35ct Multicolor Opal, Marquise, Transparent

1.35ct Multicolor Opal, Marquise, Transparent

16.1 x 5.8 mm

$ 60.51

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24.41ct Green Jadeite, Fancy, Translucent

24.41ct Green Jadeite, Fancy, Translucent

28.3 x 16.8 mm

$ 14.44

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9.29ctw Multicolor Labradorite, Round, Translucent

9.29ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 20.36

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2.58ct Green Prehnite, Pear Shape, Transparent

2.58ct Green Prehnite, Pear Shape, Transparent

11.5 x 6.9 mm

$ 14.13

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1.33ct Multicolor Labradorite, Round, Translucent

1.33ct Multicolor Labradorite, Round, Translucent

6.5 mm (calibrated)

$ 3.24

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3.03ctw Brown Smoky Quartz, Round, VVS-VS

3.03ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 23.24

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19.86ct Multicolor Agate, Oval, Opaque

19.86ct Multicolor Agate, Oval, Opaque

15 x 14.3 mm

$ 15.83

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0.70ct Orange Spessartite Garnet, Oval, SI-I1

0.70ct Orange Spessartite Garnet, Oval, SI-I1

6.3 x 4.6 mm

$ 23.70

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18.53ct Violet Amethyst, Cushion, VVS-VS

18.53ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 129.19

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0.80ct Red Rhodolite Garnet, Pear Shape, VS

0.80ct Red Rhodolite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 29.88

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0.81ct Orange Hessonite Garnet, Round, VS

0.81ct Orange Hessonite Garnet, Round, VS

5.7 mm

$ 12.38

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0.49ctw Blue Kyanite, Round, VS-SI

0.49ctw Blue Kyanite, Round, VS-SI

3.5 mm (calibrated)

$ 12.20

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2.21ct Multicolor Labradorite, Baguette, Transparent

2.21ct Multicolor Labradorite, Baguette, Transparent

8 x 6 mm (calibrated)

$ 4.84

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3.64ct Yellow Citrine, Oval, VVS-VS

3.64ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 15.95

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25.32ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

25.32ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

9 mm (calibrated)

$ 27.74

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5.70ct Yellow Citrine, Oval, VVS

5.70ct Yellow Citrine, Oval, VVS

14 x 9.5 mm

$ 37.47

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9.43ct Violet Amethyst, Pear Shape, VVS-VS

9.43ct Violet Amethyst, Pear Shape, VVS-VS

18 x 13 mm (calibrated)

$ 71.70

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3.99ct Violet Amethyst, Oval, Transparent

3.99ct Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.85

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0.95ct Green Tourmaline, Baguette, VVS

0.95ct Green Tourmaline, Baguette, VVS

8.5 x 3.6 mm

$ 33.12

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3.66ct Yellow Citrine, Oval, VVS

3.66ct Yellow Citrine, Oval, VVS

12 x 8 mm (calibrated)

$ 32.94

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3.14ct Violet Amethyst, Pear Shape, VVS

3.14ct Violet Amethyst, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 21.90

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5.44ctw Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (737827)

5.44ctw Multicolor Tourmaline, Fancy, Transparent

13 x 12 mm

$ 135.46

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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

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 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
→ View All GemSelect Reviews on Bizrate
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