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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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169.73ct Yellow Quartz Cat'S Eye, Oval, Transparent
Quartz Cat's Eye Product Video (675355)

169.73ct Yellow Quartz Cat'S Eye, Oval, Transparent

37.3 x 30.3 mm

$ 3,460.47

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12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

18.9 x 13.2 mm

$ 95.96

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24.26ctw Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (602229)

24.26ctw Multicolor Pietersite, Oval, Opaque

25.6 x 16.1 mm

$ 89.27

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10.63ct Yellow Apatite, Heart, VS-SI
Apatite Product Video (384011)

10.63ct Yellow Apatite, Heart, VS-SI

14 x 14 mm (calibrated)

$ 621.67

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33.71ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (523722)

33.71ct Multicolor Boulder Opal, Fancy, Opaque

32.6 x 22.1 mm

$ 184.67

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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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10.51ctw Pink Morganite, Oval, Transparent

10.51ctw Pink Morganite, Oval, Transparent

12 x 10 mm (calibrated)

$ 115.15

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1.81ct Brown Diamond, Round, SI
Diamond Product Video (378645)

1.81ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 4,687.18

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22.65ct Green Tsavorite Garnet, Trillion, Opaque
Tsavorite Garnet Product Video (521327)

22.65ct Green Tsavorite Garnet, Trillion, Opaque

19 x 19 mm (calibrated)

$ 496.31

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99.30ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501696)

99.30ctw White Quartz, Pear Shape, Transparent

64.7 x 20.1 mm

$ 326.38

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7.22ct Brown Smoky Quartz, Marquise, VS

7.22ct Brown Smoky Quartz, Marquise, VS

17.1 x 12 mm

$ 29.12

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4.39ctw Pink Strawberry Quartz, Round, Translucent

4.39ctw Pink Strawberry Quartz, Round, Translucent

8.5 mm (calibrated)

$ 67.34

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28.16ct Green Aventurine, Round, Opaque

28.16ct Green Aventurine, Round, Opaque

20 mm (calibrated)

$ 34.25

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31.12ct Pink Coral, Flower Cut, Opaque
Coral Product Video (256344)

31.12ct Pink Coral, Flower Cut, Opaque

21.4 x 20.7 mm

$ 542.32

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35.05ctw Multicolor Fossil Coral, Cushion, Opaque

35.05ctw Multicolor Fossil Coral, Cushion, Opaque

18.6 x 14.3 mm

$ 76.80

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18.23ct Multicolor Labradorite, Round, Opaque

18.23ct Multicolor Labradorite, Round, Opaque

21.1 mm

$ 13.62

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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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42.66ct Multicolor Quartz With Marcasite, Round, Transparent
Quartz With Marcasite Product Video (521446)

42.66ct Multicolor Quartz With Marcasite, Round, Transparent

25.1 mm

$ 280.43

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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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8.20ct Yellow Apatite, Oval, VS-SI
Apatite Product Video (407296)

8.20ct Yellow Apatite, Oval, VS-SI

15.2 x 11.5 mm

$ 372.56

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0.33ct Brown Diamond, Round, SI
Diamond Product Video (564636)

0.33ct Brown Diamond, Round, SI

4.5 mm (calibrated)

$ 456.40

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25.27ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (521442)

25.27ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

32.3 x 14.1 mm

$ 166.12

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24.49ct Blue Chalcedony, Cushion, Opaque

24.49ct Blue Chalcedony, Cushion, Opaque

21 x 20.6 mm

$ 60.99

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9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 54.62

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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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