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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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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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45.90ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (691406)

45.90ct Purple Kunzite, Pear Shape, VVS-VS

26.1 x 18.6 mm

$ 1,263.14

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1.95ctw Brown Sillimanite Cat'S Eye, Oval, Transparent

1.95ctw Brown Sillimanite Cat'S Eye, Oval, Transparent

7.1 x 5.3 mm

$ 6.42

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13.86ct Yellow Rutile Quartz, Pear Shape, Transparent

13.86ct Yellow Rutile Quartz, Pear Shape, Transparent

21.7 x 15.2 mm

$ 48.75

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1.74ct Orange Hessonite Garnet, Cushion, VVS-VS
Hessonite Garnet Product Video (644360)

1.74ct Orange Hessonite Garnet, Cushion, VVS-VS

7.7 x 7.3 mm

$ 86.65

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20.48ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (650671)

20.48ct Multicolor Pietersite, Oval, Opaque

28.2 x 19.6 mm

$ 39.95

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11.21ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (669213)

11.21ct White Rainbow Moonstone, Pear Shape, Transparent

19.2 x 11.7 mm

$ 200.98

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

8.7 x 4.1 mm

$ 39.59

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19.67ct Brown Tiger'S Eye, Baguette, Opaque

19.67ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.59

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0.81ct Green Sphene, Oval, VS-SI

0.81ct Green Sphene, Oval, VS-SI

6.6 x 4.9 mm

$ 48.81

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2.66ct Yellow Golden Beryl, Round, VVS

2.66ct Yellow Golden Beryl, Round, VVS

9 mm (calibrated)

$ 64.11

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3.81ct Multicolor Fire Agate, Fancy, Opaque

3.81ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 9.1 mm

$ 53.68

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1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

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38.51ct Green Fluorite, Round, Transparent
Fluorite Product Video (597474)

38.51ct Green Fluorite, Round, Transparent

20 mm (calibrated)

$ 70.32

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28.61ctw Multicolor Fossil Coral, Trillion, Opaque

28.61ctw Multicolor Fossil Coral, Trillion, Opaque

25 x 18 mm (calibrated)

$ 62.69

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18.78ct Pink Coral, Fancy, Opaque
Coral Product Video (256349)

18.78ct Pink Coral, Fancy, Opaque

18.1 x 16.9 mm

$ 329.21

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1.69ctw Multicolor Andalusite, Oval, VS

1.69ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 90.28

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21.16ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (678766)

21.16ct Multicolor Boulder Opal, Fancy, Opaque

25.6 x 16.9 mm

$ 105.38

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94.13ct Multicolor Jasper, Round, Opaque

94.13ct Multicolor Jasper, Round, Opaque

41.5 mm

$ 54.38

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12.91ct Brown Smoky Quartz, Emerald Cut, VVS

12.91ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 29.47

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1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.3 mm

$ 4.86

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9.00ct Yellow Apatite, Oval, VS
Apatite Product Video (407297)

9.00ct Yellow Apatite, Oval, VS

16.4 x 11.1 mm

$ 408.91

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42.68ct Multicolor Jasper, Cushion, Opaque

42.68ct Multicolor Jasper, Cushion, Opaque

30 x 22 mm (calibrated)

$ 35.28

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15.89ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (438948)

15.89ct Yellow Apatite, Emerald Cut, VS

15 x 15 mm (calibrated)

$ 609.32

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 -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 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 -> 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
→ View All GemSelect Reviews on Bizrate
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