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
17.45ct Turquoise Cat'S Eye Aquamarine, Oval, Transparent
Cat's Eye Aquamarine Product Video (382728)

17.45ct Turquoise Cat'S Eye Aquamarine, Oval, Transparent

18.9 x 12.4 mm

$ 306.66

View Gem
1.29ct Yellow Beryl, Oval, VVS-VS

1.29ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 25.70

View Gem
1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

6.6 x 6 mm

$ 74.10

View Gem
0.16ct Black Diamond, Square, Opaque

0.16ct Black Diamond, Square, Opaque

2.7 x 2.7 mm

$ 79.68

View Gem
0.20ctw White Diamond, Round, VVS-VS

0.20ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 325.04

View Gem
1.88ct Orange Sapphire, Oval, VS-SI
Sapphire Product Video (746901)

1.88ct Orange Sapphire, Oval, VS-SI

7.8 x 6.8 mm

$ 624.16

View Gem
1.55ct Purple Spinel, Oval, VVS-VS

1.55ct Purple Spinel, Oval, VVS-VS

7 x 6.7 mm

$ 258.13

View Gem
10.13ctw Black Spinel, Round, Opaque

10.13ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 33.30

View Gem
1.75ct Yellow Beryl, Oval, VVS

1.75ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 34.86

View Gem
0.77ct Purple Spinel, Cushion, VVS-VS

0.77ct Purple Spinel, Cushion, VVS-VS

5.5 x 5.4 mm

$ 53.68

View Gem
4.42ct Pink Morganite, Pear Shape, Transparent

4.42ct Pink Morganite, Pear Shape, Transparent

16 x 8 mm (calibrated)

$ 48.42

View Gem
7.81ct Blue Aquamarine, Emerald Cut, Translucent
Aquamarine Product Video (730375)

7.81ct Blue Aquamarine, Emerald Cut, Translucent

14 x 10 mm (calibrated)

$ 162.06

View Gem
1.25ct Yellow Beryl, Trillion, VS

1.25ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 29.88

View Gem
3.93ctw Yellow Golden Beryl, Oval, VVS-VS

3.93ctw Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 97.86

View Gem
2.02ct Yellow Beryl, Round, VVS

2.02ct Yellow Beryl, Round, VVS

9 mm (calibrated)

$ 40.24

View Gem
0.13ctw Black Diamond, Square, Opaque

0.13ctw Black Diamond, Square, Opaque

2 x 1.9 mm

$ 64.74

View Gem
5.37ct Pink Morganite, Oval, Translucent

5.37ct Pink Morganite, Oval, Translucent

14 x 10 mm (calibrated)

$ 22.29

View Gem
9.58ctw Black Spinel, Round, Opaque

9.58ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 36.74

View Gem
7.62ctw White Topaz, Square, VVS-VS

7.62ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 61.36

View Gem
5.18ct Pink Morganite, Oval, Translucent

5.18ct Pink Morganite, Oval, Translucent

11.6 x 9.1 mm

$ 56.76

View Gem
13.85ctw Black Spinel, Heart, Opaque

13.85ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 75.88

View Gem
3.97ctw White Topaz, Square, VS

3.97ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 30.44

View Gem
0.86ct Purple Spinel, Oval, VS

0.86ct Purple Spinel, Oval, VS

7.1 x 5.4 mm

$ 60.61

View Gem
0.54ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

0.54ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

6 x 4 mm (calibrated)

$ 16.14

View Gem
1 2 3
...
144
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 -> 8 star ratings

Good prices

Posted By TRM in October, 2025
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

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image