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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
Faceted
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11.49ct Brown Star Moonstone, Oval, Translucent

11.49ct Brown Star Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 41.96

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4.38ct Multicolor Opal, Trillion, Translucent

4.38ct Multicolor Opal, Trillion, Translucent

12.5 x 12.3 mm

$ 109.06

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6.31ct Turquoise Grandidierite, Oval, SI-I1
Grandidierite Product Video (568861)

6.31ct Turquoise Grandidierite, Oval, SI-I1

13 x 11 mm (calibrated)

$ 283.45

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15.27ct Green Prehnite, Oval, Translucent

15.27ct Green Prehnite, Oval, Translucent

18 x 13 mm (calibrated)

$ 35.14

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17.53ct Red Strawberry Quartz, Oval, Translucent

17.53ct Red Strawberry Quartz, Oval, Translucent

20 x 15 mm (calibrated)

$ 112.03

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1.10ct Green Tsavorite Garnet, Heart, VS-SI
Tsavorite Garnet Product Video (415384)

1.10ct Green Tsavorite Garnet, Heart, VS-SI

6.7 x 5.8 mm

$ 602.58

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4.62ctw Brown Diamond, Square, VS-SI
Diamond Product Video (460459)

4.62ctw Brown Diamond, Square, VS-SI

7.4 x 7.2 mm

$ 8,052.66

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0.36ct Green Kornerupine, Baguette, VS

0.36ct Green Kornerupine, Baguette, VS

5.2 x 3.3 mm

$ 30.83

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2.50ct Green Peridot, Cushion, VS-SI

2.50ct Green Peridot, Cushion, VS-SI

8.9 x 7.9 mm

$ 82.17

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29.21ct Blue Chalcedony, Cushion, Opaque

29.21ct Blue Chalcedony, Cushion, Opaque

33.6 x 18.4 mm

$ 60.61

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2.38ct Green Peridot, Cushion, VS

2.38ct Green Peridot, Cushion, VS

9.5 x 7 mm

$ 93.87

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30.47ct Brown Moonstone, Fancy, Opaque

30.47ct Brown Moonstone, Fancy, Opaque

25 x 18 mm (calibrated)

$ 35.05

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76.12ct Multicolor Jasper, Pear Shape, Translucent
Jasper Product Video (433017)

76.12ct Multicolor Jasper, Pear Shape, Translucent

41.4 x 34.5 mm

$ 60.66

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64.31ct Multicolor Jasper, Pear Shape, Opaque

64.31ct Multicolor Jasper, Pear Shape, Opaque

30.6 x 32.1 mm

$ 54.25

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22.34ct White Howlite, Pear Shape, Opaque

22.34ct White Howlite, Pear Shape, Opaque

30.1 x 18.6 mm

$ 11.12

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0.18ct Brown Diamond, Round, VVS-VS
Diamond Product Video (564626)

0.18ct Brown Diamond, Round, VVS-VS

3.7 mm

$ 328.60

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48.14ct Green Aventurine, Round, Opaque

48.14ct Green Aventurine, Round, Opaque

24.9 mm

$ 53.23

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3.05ct Turquoise Grandidierite, Emerald Cut, SI

3.05ct Turquoise Grandidierite, Emerald Cut, SI

13 x 6.9 mm

$ 133.66

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5.47ctw Brown Smoky Quartz, Oval, VVS

5.47ctw Brown Smoky Quartz, Oval, VVS

10 x 8 mm (calibrated)

$ 32.69

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11.21ct Pink Morganite, Oval, Translucent

11.21ct Pink Morganite, Oval, Translucent

17.5 x 12.1 mm

$ 122.82

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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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0.16ctw White Diamond, Round, VVS-VS

0.16ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 242.24

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12.04ct Pink Kunzite, Pear Shape, VS
Kunzite Product Video (482110)

12.04ct Pink Kunzite, Pear Shape, VS

19.3 x 9.5 mm

$ 227.84

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44.66ct Multicolor Jasper, Trillion, Opaque
Jasper Product Video (470619)

44.66ct Multicolor Jasper, Trillion, Opaque

34.8 x 23.5 mm

$ 35.77

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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

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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