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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
Single
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Lots
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2.61ct Brown Smoky Quartz, Oval, VS

2.61ct Brown Smoky Quartz, Oval, VS

10 x 8 mm (calibrated)

$ 18.19

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0.76ct Purple Spinel, Oval, VVS

0.76ct Purple Spinel, Oval, VVS

6.1 x 4.7 mm

$ 71.17

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3.75ctw Red Pyrope Garnet, Marquise, VVS-VS

3.75ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 6 mm

$ 37.10

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4.78ct Yellow Citrine, Oval, VVS

4.78ct Yellow Citrine, Oval, VVS

14 x 9 mm (calibrated)

$ 31.42

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0.60ct Violet Amethyst, Emerald Cut, VS

0.60ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.49

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2.52ct Orange Hessonite Garnet, Oval, VS

2.52ct Orange Hessonite Garnet, Oval, VS

9.2 x 7.4 mm

$ 46.93

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1.86ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.86ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 36.69

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0.90ct Violet Spinel, Oval, VS

0.90ct Violet Spinel, Oval, VS

6.4 x 5.2 mm

$ 84.28

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24.72ct Multicolor Pietersite, Oval, Opaque

24.72ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 98.49

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10.21ctw Violet Amethyst, Round, Transparent

10.21ctw Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 55.93

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10.81ctw White Dendritic Agate, Pear Shape, Opaque

10.81ctw White Dendritic Agate, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 8.62

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4.11ctw Purple Rhodolite Garnet, Oval, VS

4.11ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 87.41

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1.70ctw White Rainbow Moonstone, Pear Shape, Transparent

1.70ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 31.66

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0.68ct Green Sphene, Oval, Transparent

0.68ct Green Sphene, Oval, Transparent

5.7 x 4.9 mm

$ 3.39

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4.16ct Multicolor Opal, Oval, Transparent

4.16ct Multicolor Opal, Oval, Transparent

14 x 10.6 mm

$ 104.58

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1.69ct Pink Strawberry Quartz, Round, Translucent

1.69ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 12.96

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.6 x 5.1 mm

$ 22.83

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33.02ct Yellow Obsidian, Pear Shape, Opaque

33.02ct Yellow Obsidian, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 36.17

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1.43ct Orange Zircon, Round, VVS-VS

1.43ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 31.33

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2.92ctw Pink Strawberry Quartz, Oval, Translucent

2.92ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 17.85

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0.48ct Orange Carnelian, Marquise, Transparent

0.48ct Orange Carnelian, Marquise, Transparent

8 x 4 mm (calibrated)

$ 2.40

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0.74ct Orange Sphalerite, Oval, VS-SI

0.74ct Orange Sphalerite, Oval, VS-SI

5.7 x 4.9 mm

$ 36.85

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3.73ct Pink Tourmaline, Emerald Cut, VS

3.73ct Pink Tourmaline, Emerald Cut, VS

10.1 x 6.7 mm

$ 183.90

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24.04ctw Multicolor Fossil Coral, Cushion, Opaque

24.04ctw Multicolor Fossil Coral, Cushion, Opaque

13.9 x 13.4 mm

$ 52.68

View Gem
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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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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