X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
Clear All
0.25ct Yellow Diamond, Round, VS-SI
Diamond Product Video (564593)

0.25ct Yellow Diamond, Round, VS-SI

4 mm (calibrated)

$ 456.41

View Gem
0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 33.87

View Gem
1.74ct Violet Spinel, Cushion, VS

1.74ct Violet Spinel, Cushion, VS

6.9 x 6.6 mm

$ 101.48

View Gem
2.04ct Yellow Golden Beryl, Oval, VS

2.04ct Yellow Golden Beryl, Oval, VS

10 x 8 mm (calibrated)

$ 55.88

View Gem
0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.2 mm (calibrated)

$ 16.28

View Gem
14.99ctw Black Spinel, Round, Opaque

14.99ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 49.27

View Gem
4.33ct White Topaz, Round, VVS-VS

4.33ct White Topaz, Round, VVS-VS

10 mm (calibrated)

$ 20.16

View Gem
0.62ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.62ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4.5 mm

$ 128.65

View Gem
0.69ct Yellow Beryl, Oval, VVS

0.69ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 17.18

View Gem
5.13ctw Brown Rutile Topaz, Pear Shape, Transparent

5.13ctw Brown Rutile Topaz, Pear Shape, Transparent

11 x 7.9 mm

$ 106.45

View Gem
0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 14.53

View Gem
3.09ctw White Topaz, Cushion, VVS-VS

3.09ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.93

View Gem
1.03ct Pink Morganite, Cushion, VVS-VS

1.03ct Pink Morganite, Cushion, VVS-VS

8 x 5.3 mm

$ 45.14

View Gem
21.23ctw Black Spinel, Oval, Opaque

21.23ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 81.41

View Gem
1.57ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (577317)

1.57ct Purple Spinel, Cushion, VVS-VS

7.4 x 6 mm

$ 260.62

View Gem
7.05ct Blue Aquamarine, Oval, Translucent

7.05ct Blue Aquamarine, Oval, Translucent

16 x 12 mm (calibrated)

$ 51.49

View Gem
2.16ctw Yellow Beryl, Trillion, VVS

2.16ctw Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 43.03

View Gem
0.62ct Gray Chrysoberyl Cat'S Eye, Oval, Opaque

0.62ct Gray Chrysoberyl Cat'S Eye, Oval, Opaque

5.9 x 3.6 mm

$ 18.53

View Gem
0.21ct Black Diamond, Square, Opaque

0.21ct Black Diamond, Square, Opaque

2.9 x 2.9 mm

$ 104.58

View Gem
0.82ct Pink Morganite, Oval, VVS-VS

0.82ct Pink Morganite, Oval, VVS-VS

8 x 5.2 mm

$ 71.87

View Gem
0.99ct Yellow Beryl, Oval, VVS

0.99ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 24.65

View Gem
3.88ct White Topaz, Round, VS
Topaz Product Video (390984)

3.88ct White Topaz, Round, VS

9 mm (calibrated)

$ 24.80

View Gem
0.08ctw Black Diamond, Round, Opaque

0.08ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 63.74

View Gem
6.33ct Pink Morganite, Oval, Transparent

6.33ct Pink Morganite, Oval, Transparent

12 x 10 mm (calibrated)

$ 63.05

View Gem
1 2 3
...
71
Choose Page
1 - 188

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

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 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 -> 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 -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image