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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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5.00ctw Green Prehnite, Oval, Transparent

5.00ctw Green Prehnite, Oval, Transparent

7.3 x 5.7 mm

$ 27.39

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8.99ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (486209)

8.99ct Green Actinolite Cat'S Eye, Oval, Translucent

16 x 12 mm (calibrated)

$ 52.23

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2.09ct Orange Hessonite Garnet, Cushion, VS

2.09ct Orange Hessonite Garnet, Cushion, VS

8.3 x 6.3 mm

$ 35.15

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19.30ct Bi-Color Ametrine, Pear Shape, VVS-VS

19.30ct Bi-Color Ametrine, Pear Shape, VVS-VS

20.3 x 18.6 mm

$ 148.01

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98.01ct Pink Rose Quartz, Square, Opaque
Rose Quartz Product Video (753279)

98.01ct Pink Rose Quartz, Square, Opaque

27 x 26.7 mm

$ 203.37

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9.78ct Black Tourmaline, Emerald Cut, Opaque

9.78ct Black Tourmaline, Emerald Cut, Opaque

15 x 10 mm (calibrated)

$ 48.70

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0.90ct Orange Zircon, Oval, VVS-VS

0.90ct Orange Zircon, Oval, VVS-VS

6.1 x 5 mm

$ 22.41

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1.56ct Orange Hessonite Garnet, Round, SI

1.56ct Orange Hessonite Garnet, Round, SI

7 mm (calibrated)

$ 29.05

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25.03ctw Multicolor Jasper, Pear Shape, Opaque

25.03ctw Multicolor Jasper, Pear Shape, Opaque

29.7 x 15.6 mm

$ 14.71

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9.68ct Green Prehnite, Fancy, Transparent

9.68ct Green Prehnite, Fancy, Transparent

19 x 12.7 mm

$ 9.37

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28.95ct Pink Rose Quartz, Oval, Transparent/Translucent

28.95ct Pink Rose Quartz, Oval, Transparent/Translucent

22.8 x 17.2 mm

$ 34.36

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0.61ctw Blue Kyanite, Round, VS-SI

0.61ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 10.94

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18.24ct Multicolor Psilomelane Dendrite, Cushion, Opaque

18.24ct Multicolor Psilomelane Dendrite, Cushion, Opaque

25 x 18 mm (calibrated)

$ 14.71

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1.07ct Green Peridot, Oval, VS

1.07ct Green Peridot, Oval, VS

7.5 x 5.5 mm

$ 9.59

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4.62ct Multicolor Dendritic Agate, Pear Shape, Transparent

4.62ct Multicolor Dendritic Agate, Pear Shape, Transparent

17.1 x 13.8 mm

$ 16.41

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1.70ctw Green Demantoid Garnet, Round, VS-SI

1.70ctw Green Demantoid Garnet, Round, VS-SI

3.3 mm

$ 67.73

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4.64ctw White Topaz, Cushion, VVS-VS

4.64ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 25.41

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1.59ct Purple Kunzite, Fancy, VVS-VS

1.59ct Purple Kunzite, Fancy, VVS-VS

6.6 x 6.4 mm

$ 39.59

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0.94ctw Yellow Citrine, Heart, VVS-VS

0.94ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.49

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1.35ctw Yellow Citrine, Heart, VVS-VS

1.35ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.41

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2.40ct Orange Sunstone, Oval, Transparent

2.40ct Orange Sunstone, Oval, Transparent

10 x 8.5 mm

$ 17.59

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1.05ct Red Rhodolite Garnet, Pear Shape, VS

1.05ct Red Rhodolite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 27.89

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25.71ct Multicolor Jasper, Oval, Opaque

25.71ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 20.28

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2.91ct Brown Rutile Topaz, Pear Shape, Transparent

2.91ct Brown Rutile Topaz, Pear Shape, Transparent

13.4 x 6.6 mm

$ 60.38

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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

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Fairly good selection of calibrated gems but would like to see more in various sizes, esp rounds,

Posted By Eddie in August, 2026
Source: Bizrate

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
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