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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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6.04ct Yellow Citrine, Briolette, VVS

6.04ct Yellow Citrine, Briolette, VVS

14 x 9 mm (calibrated)

$ 33.81

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0.92ctw Green Peridot, Pear Shape, VVS-VS

0.92ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.07

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9.10ct Pink Kunzite, Oval, VVS-VS
Kunzite Product Video (695119)

9.10ct Pink Kunzite, Oval, VVS-VS

14.6 x 9.4 mm

$ 226.59

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23.01ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (523181)

23.01ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

28.2 x 16 mm

$ 151.26

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0.70ct Yellow Color-Change Diaspore, Oval, VS

0.70ct Yellow Color-Change Diaspore, Oval, VS

7.3 x 4.3 mm

$ 25.91

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2.46ct Pink Kunzite, Emerald Cut, VVS-VS

2.46ct Pink Kunzite, Emerald Cut, VVS-VS

9.6 x 5 mm

$ 61.25

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4.43ct Yellow Citrine, Cushion, VVS-VS

4.43ct Yellow Citrine, Cushion, VVS-VS

12.9 x 8.2 mm

$ 33.97

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7.55ct Brown Hessonite Garnet, Oval, Translucent

7.55ct Brown Hessonite Garnet, Oval, Translucent

12.9 x 10 mm

$ 41.37

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2.55ct Orange Hessonite Garnet, Oval, VVS-VS

2.55ct Orange Hessonite Garnet, Oval, VVS-VS

9.1 x 7.5 mm

$ 38.03

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2.52ct Orange Hessonite Garnet, Oval, VS

2.52ct Orange Hessonite Garnet, Oval, VS

9.1 x 7.6 mm

$ 55.22

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1.95ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.95ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 32.79

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4.70ctw Yellow Citrine, Oval, VVS-VS

4.70ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 25.75

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4.08ct Multicolor Fire Agate, Fancy, Opaque

4.08ct Multicolor Fire Agate, Fancy, Opaque

11 x 9 mm (calibrated)

$ 31.37

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3.38ctw Red Pyrope Garnet, Oval, VVS-VS

3.38ctw Red Pyrope Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 29.62

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7.98ct White Quartz Cat'S Eye, Round, Transparent

7.98ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 28.34

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2.07ct Orange Hessonite Garnet, Oval, VS

2.07ct Orange Hessonite Garnet, Oval, VS

8.5 x 7.1 mm

$ 39.18

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3.18ct Yellow Citrine, Oval, VVS-VS

3.18ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.17

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19.82ct White Agate, Oval, Opaque

19.82ct White Agate, Oval, Opaque

25 x 18 mm (calibrated)

$ 31.38

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3.57ctw Orange Moonstone, Trillion, Translucent

3.57ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.15

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5.49ctw Brown Tiger'S Eye, Oval, Opaque

5.49ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.21

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0.50ct Yellow Color-Change Diaspore, Square, VS

0.50ct Yellow Color-Change Diaspore, Square, VS

4.5 x 4.5 mm

$ 18.96

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1.39ctw Yellow Citrine, Heart, VVS-VS

1.39ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.69

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4.03ct Yellow Citrine, Oval, VVS-VS

4.03ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 28.10

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23.68ct Multicolor Jasper, Oval, Opaque

23.68ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 18.87

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

All good

Posted By DouscheGift in August, 2025
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

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
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

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
→ View All GemSelect Reviews on Bizrate
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