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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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10.69ct Black Tourmaline, Emerald Cut, Opaque

10.69ct Black Tourmaline, Emerald Cut, Opaque

15 x 11 mm

$ 53.24

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7.31ct Green Actinolite Cat'S Eye, Oval, Translucent

7.31ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 12 mm (calibrated)

$ 50.96

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0.95ct Pink Spinel, Cushion, VS

0.95ct Pink Spinel, Cushion, VS

5.9 x 5.5 mm

$ 70.97

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5.49ct Green Prehnite, Fancy, Translucent

5.49ct Green Prehnite, Fancy, Translucent

15.3 x 10.8 mm

$ 9.02

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0.96ct Yellow Beryl, Oval, VS

0.96ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 23.90

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2.96ct Pink Strawberry Quartz, Oval, Transparent

2.96ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.20

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0.45ct Green Peridot, Marquise, VVS-VS

0.45ct Green Peridot, Marquise, VVS-VS

7.5 x 3.7 mm

$ 6.72

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1.33ct Multicolor Labradorite, Round, Translucent

1.33ct Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 2.86

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2.17ct Yellow Beryl, Trillion, VS

2.17ct Yellow Beryl, Trillion, VS

9 x 9 mm (calibrated)

$ 47.55

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7.32ct Yellow Rutile Quartz, Pear Shape, Transparent

7.32ct Yellow Rutile Quartz, Pear Shape, Transparent

15 x 11 mm

$ 18.08

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1.96ct Yellow Rutile Topaz, Pear Shape, Transparent
Rutile Topaz Product Video (753626)

1.96ct Yellow Rutile Topaz, Pear Shape, Transparent

10.5 x 6.9 mm

$ 40.67

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1.31ct Pink Strawberry Quartz, Round, Translucent

1.31ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 13.14

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3.19ct Orange Sunstone, Oval, Transparent

3.19ct Orange Sunstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 48.94

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3.20ct Multicolor Ruby In Fuchsite, Marquise, Translucent

3.20ct Multicolor Ruby In Fuchsite, Marquise, Translucent

17.5 x 8.2 mm

$ 23.64

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2.50ct Purple Rhodolite Garnet, Oval, VVS

2.50ct Purple Rhodolite Garnet, Oval, VVS

8.7 x 7.3 mm

$ 67.02

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2.10ctw Orange Citrine, Heart, VS

2.10ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 17.43

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6.20ctw Green Prehnite, Pear Shape, Transparent/Translucent

6.20ctw Green Prehnite, Pear Shape, Transparent/Translucent

12 x 6.8 mm

$ 19.02

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1.48ct Blue Kyanite, Oval, SI

1.48ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 29.48

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0.74ct Blue Kyanite, Round, SI

0.74ct Blue Kyanite, Round, SI

5.3 mm

$ 18.43

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1.22ct Multicolor Opal, Oval, Transparent

1.22ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.68

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5.50ct White Topaz, Oval, VVS-VS
Topaz Product Video (751900)

5.50ct White Topaz, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 36.52

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2.66ct Green Prehnite, Round, Transparent

2.66ct Green Prehnite, Round, Transparent

8 mm (calibrated)

$ 14.34

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3.07ct Violet Amethyst, Trillion, VS

3.07ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.82

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9.42ct Yellow Cat'S Eye Apatite, Oval, Translucent
Cat's Eye Apatite Product Video (411932)

9.42ct Yellow Cat'S Eye Apatite, Oval, Translucent

12.6 x 11.5 mm

$ 103.20

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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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
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

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 -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate
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