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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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Faceted
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25.91ct Brown Tiger'S Eye, Fancy, Opaque

25.91ct Brown Tiger'S Eye, Fancy, Opaque

33.5 x 9.7 mm

$ 7.74

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0.76ct Pink Morganite, Pear Shape, VS

0.76ct Pink Morganite, Pear Shape, VS

9.8 x 4.7 mm

$ 66.62

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2.77ctw Yellow Tourmaline, Oval, VS
Tourmaline Product Video (701516)

2.77ctw Yellow Tourmaline, Oval, VS

8 x 6 mm (calibrated)

$ 110.36

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0.77ct Orange Sphalerite, Oval, SI-I1

0.77ct Orange Sphalerite, Oval, SI-I1

5.6 x 5 mm

$ 38.35

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1.54ct Yellow Diamond, Round, SI
Diamond Product Video (378641)

1.54ct Yellow Diamond, Round, SI

7 mm (calibrated)

$ 4,386.78

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1.32ct Blue Kyanite, Round, SI

1.32ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 32.87

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2.64ct Violet Amethyst, Round, VS

2.64ct Violet Amethyst, Round, VS

9 mm (calibrated)

$ 20.25

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5.53ct Violet Amethyst, Briolette, VS

5.53ct Violet Amethyst, Briolette, VS

13.4 x 7.9 mm

$ 20.19

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0.58ct White Topaz, Square, VVS-VS
Topaz Product Video (636248)

0.58ct White Topaz, Square, VVS-VS

4.6 x 4.6 mm

$ 3.36

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4.97ctw Multicolor Labradorite, Round, Translucent

4.97ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 12.08

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1.83ct Orange Hessonite Garnet, Emerald Cut, VS

1.83ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 36.09

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS

2.15ct Orange Hessonite Garnet, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 35.91

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1.93ct Orange Hessonite Garnet, Round, VS

1.93ct Orange Hessonite Garnet, Round, VS

7.5 mm (calibrated)

$ 42.29

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51.51ct Multicolor Variscite, Cushion, Opaque
Variscite Product Video (472206)

51.51ct Multicolor Variscite, Cushion, Opaque

33.9 x 29.9 mm

$ 41.77

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49.70ct Multicolor Psilomelane Dendrite, Oval, Opaque

49.70ct Multicolor Psilomelane Dendrite, Oval, Opaque

38.7 x 22.6 mm

$ 40.10

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0.58ct Pink Spinel, Oval, VS
Spinel Product Video (714549)

0.58ct Pink Spinel, Oval, VS

4.6 x 4 mm

$ 962.80

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15.01ctw Green Prehnite, Fancy, Transparent

15.01ctw Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 23.51

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3.43ct Yellow Cat'S Eye Opal, Oval, Opaque

3.43ct Yellow Cat'S Eye Opal, Oval, Opaque

10.4 x 8.6 mm

$ 10.25

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3.74ctw Pink Strawberry Quartz, Round, Transparent

3.74ctw Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 57.37

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98.03ct Brown Tiger'S Eye, Cushion, Opaque

98.03ct Brown Tiger'S Eye, Cushion, Opaque

41.7 x 29.4 mm

$ 41.00

View Gem
1.41ctw Green Demantoid Garnet, Round, VS
Demantoid Garnet Product Video (255621)

1.41ctw Green Demantoid Garnet, Round, VS

3.5 mm (calibrated)

$ 195.78

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0.53ctw White Diamond, Heart, VVS
Diamond Product Video (685658)

0.53ctw White Diamond, Heart, VVS

2.9 x 2.6 mm

$ 2,159.34

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1.97ct Brown Rutile Quartz, Round, Translucent
Rutile Quartz Product Video (503694)

1.97ct Brown Rutile Quartz, Round, Translucent

8 mm (calibrated)

$ 4.77

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1.27ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.27ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5 mm (calibrated)

$ 65.40

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

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 -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The gem I selected was the right size and matched exactly other gems on the bracelet. This greatly pleased me. The picture and color exactly matched the delivery.

Posted By Sam in September, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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