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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
Pairs
Lots
Faceted
Cabochons
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22.77ct White Amazonite, Fancy, Translucent

22.77ct White Amazonite, Fancy, Translucent

33.4 x 9.4 mm

$ 10.40

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11.83ct Blue Chalcedony, Pear Shape, Opaque

11.83ct Blue Chalcedony, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 29.47

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1.84ct Multicolor Opal, Marquise, Transparent

1.84ct Multicolor Opal, Marquise, Transparent

13.8 x 6.7 mm

$ 64.14

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0.51ctw White Diamond, Heart, VVS
Diamond Product Video (685659)

0.51ctw White Diamond, Heart, VVS

3.3 x 2.9 mm

$ 2,077.86

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1.50ct Orange Sphalerite, Round, SI-I1
Sphalerite Product Video (691695)

1.50ct Orange Sphalerite, Round, SI-I1

6.5 mm (calibrated)

$ 62.25

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20.55ct Multicolor Boulder Opal, Pear Shape, Opaque

20.55ct Multicolor Boulder Opal, Pear Shape, Opaque

31.9 x 16.1 mm

$ 112.58

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3.27ctw Yellow Sillimanite, Oval, VVS-VS
Sillimanite Product Video (411628)

3.27ctw Yellow Sillimanite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 125.40

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12.19ct Orange Sphalerite, Oval, SI-I1
Sphalerite Product Video (690767)

12.19ct Orange Sphalerite, Oval, SI-I1

14.9 x 11.6 mm

$ 607.06

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19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

23.8 x 17.9 mm

$ 50.58

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4.33ct Orange Sphalerite, Oval, SI-I1
Sphalerite Product Video (690769)

4.33ct Orange Sphalerite, Oval, SI-I1

11 x 9 mm (calibrated)

$ 215.63

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1.46ct Blue Kyanite, Round, SI-I1

1.46ct Blue Kyanite, Round, SI-I1

7 mm (calibrated)

$ 39.99

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8.15ct Blue Tourmaline, Fancy, Transparent
Tourmaline Product Video (690455)

8.15ct Blue Tourmaline, Fancy, Transparent

20 x 18.3 mm

$ 238.51

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4.06ct Orange Sunstone, Round, Translucent

4.06ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 37.07

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2.71ct Red Fire Opal, Oval, Transparent
Fire Opal Product Video (675394)

2.71ct Red Fire Opal, Oval, Transparent

11.9 x 9.2 mm

$ 72.72

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10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

28.1 x 13.1 mm

$ 79.85

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9.09ct Green Prehnite, Oval, Translucent
Prehnite Product Video (219857)

9.09ct Green Prehnite, Oval, Translucent

16 x 12 mm (calibrated)

$ 44.81

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13.51ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (522183)

13.51ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

23.4 x 13.9 mm

$ 88.81

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29.74ct Brown Moonstone, Oval, Opaque

29.74ct Brown Moonstone, Oval, Opaque

22 x 16.3 mm

$ 65.17

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1.67ct Brown Diamond, Round, SI
Diamond Product Video (378646)

1.67ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 3,603.86

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2.97ctw Orange Hessonite Garnet, Cushion, VS-SI
Hessonite Garnet Product Video (338676)

2.97ctw Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 112.54

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12.80ct Pink Rose Quartz, Emerald Cut, Transparent

12.80ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 58.43

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65.37ct Multicolor Jasper, Cushion, Opaque

65.37ct Multicolor Jasper, Cushion, Opaque

36 x 29.1 mm

$ 55.14

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0.60ct Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (278683)

0.60ct Green Demantoid Garnet, Oval, VS

6 x 4.2 mm

$ 164.34

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69.17ctw White Howlite, Sphere / Ball, Opaque
Howlite Product Video (422984)

69.17ctw White Howlite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 60.62

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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

So far So good

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

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

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 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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