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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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2.27ct Orange Sphalerite, Round, SI-I1

2.27ct Orange Sphalerite, Round, SI-I1

7.5 mm (calibrated)

$ 113.05

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0.71ct Green Peridot, Oval, VS

0.71ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 9.07

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.6 mm (calibrated)

$ 254.36

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0.23ct Yellow Diamond, Round, VS
Diamond Product Video (564615)

0.23ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 419.90

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7.14ct Brown Rutile Quartz, Round, Translucent

7.14ct Brown Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 17.92

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0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 272.54

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1.32ct Orange Sphalerite, Emerald Cut, I1

1.32ct Orange Sphalerite, Emerald Cut, I1

7 x 5 mm (calibrated)

$ 65.74

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24.65ct Violet Amethyst, Emerald Cut, VS
Amethyst Product Video (692347)

24.65ct Violet Amethyst, Emerald Cut, VS

20 x 15 mm (calibrated)

$ 143.22

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11.48ct Multicolor Quartz With Marcasite, Baguette, Transparent

11.48ct Multicolor Quartz With Marcasite, Baguette, Transparent

16 x 12 mm (calibrated)

$ 62.89

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54.75ct White Dendritic Agate, Oval, Opaque

54.75ct White Dendritic Agate, Oval, Opaque

36.9 x 23.7 mm

$ 38.18

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1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5.3 mm

$ 57.72

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7.51ct Multicolor Coral, Round, Translucent
Coral Product Video (517241)

7.51ct Multicolor Coral, Round, Translucent

14 mm (calibrated)

$ 23.77

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8.99ctw Pink Strawberry Quartz, Oval, Transparent

8.99ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 137.90

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17.43ct Brown Smoky Quartz, Round, VVS
Smoky Quartz Product Video (503802)

17.43ct Brown Smoky Quartz, Round, VVS

18 mm (calibrated)

$ 57.29

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1.95ctw Brown Sillimanite Cat'S Eye, Oval, Transparent

1.95ctw Brown Sillimanite Cat'S Eye, Oval, Transparent

7.1 x 5.3 mm

$ 6.42

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13.37ct Pink Morganite, Marquise, VS
Morganite Product Video (594874)

13.37ct Pink Morganite, Marquise, VS

27.5 x 10.9 mm

$ 1,831.02

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47.80ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (391975)

47.80ct Multicolor Rhodochrosite, Oval, Opaque

27 x 20 mm (calibrated)

$ 104.74

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10.37ctw Brown Moonstone, Flower Cut, Translucent

10.37ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 45.45

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1.85ct Yellow Diamond, Round, SI
Diamond Product Video (378643)

1.85ct Yellow Diamond, Round, SI

7.5 mm (calibrated)

$ 4,790.76

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4.94ct Yellow Apatite, Baguette, VS
Apatite Product Video (438947)

4.94ct Yellow Apatite, Baguette, VS

12.5 x 7.4 mm

$ 254.38

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11.87ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450371)

11.87ct Blue Aquamarine, Emerald Cut, VVS

17.4 x 10 mm

$ 2,955.63

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4.31ctw Orange Hessonite Garnet, Square, VS
Hessonite Garnet Product Video (392993)

4.31ctw Orange Hessonite Garnet, Square, VS

6.9 x 6.7 mm

$ 94.44

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34.60ct Multicolor Rhodochrosite, Oval, Translucent

34.60ct Multicolor Rhodochrosite, Oval, Translucent

32.1 x 17.7 mm

$ 30.33

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19.94ct Multicolor Boulder Opal, Marquise, Opaque

19.94ct Multicolor Boulder Opal, Marquise, Opaque

36.4 x 16.3 mm

$ 109.23

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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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 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
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