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
0.53ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.53ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.8 x 4.5 mm

$ 109.98

View Gem
1.16ct Yellow Chrysoberyl, Oval, VS-SI
Chrysoberyl Product Video (366304)

1.16ct Yellow Chrysoberyl, Oval, VS-SI

7.1 x 6.1 mm

$ 135.27

View Gem
4.11ct Pink Morganite, Trillion, Transparent

4.11ct Pink Morganite, Trillion, Transparent

11 x 11 mm (calibrated)

$ 45.03

View Gem
2.80ctw Yellow Beryl, Oval, VVS-VS

2.80ctw Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 55.78

View Gem
0.99ct Yellow Beryl, Oval, VS

0.99ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 18.90

View Gem
0.62ct Pink Spinel, Cushion, VVS-VS

0.62ct Pink Spinel, Cushion, VVS-VS

5.4 x 4.7 mm

$ 43.23

View Gem
2.33ct Violet Sapphire, Oval, VS

2.33ct Violet Sapphire, Oval, VS

9.5 x 7.4 mm

$ 932.00

View Gem
0.87ct Purple Spinel, Cushion, VS

0.87ct Purple Spinel, Cushion, VS

6.5 x 5.5 mm

$ 47.66

View Gem
17.73ctw Black Spinel, Heart, Opaque

17.73ctw Black Spinel, Heart, Opaque

13 x 13 mm (calibrated)

$ 58.27

View Gem
0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.4 x 4.3 mm

$ 128.00

View Gem
1.38ct Purple Spinel, Cushion, VVS

1.38ct Purple Spinel, Cushion, VVS

7.3 x 6.2 mm

$ 137.45

View Gem
1.36ct Pink Morganite, Oval, VS

1.36ct Pink Morganite, Oval, VS

8.4 x 6.2 mm

$ 104.30

View Gem
0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 29.03

View Gem
6.46ctw White Topaz, Oval, VVS-VS

6.46ctw White Topaz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 42.47

View Gem
0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2 mm (calibrated)

$ 26.15

View Gem
1.21ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (743034)

1.21ct Purple Spinel, Cushion, VVS-VS

6.6 x 6.1 mm

$ 200.86

View Gem
3.70ct Yellow Rutile Topaz, Oval, Transparent

3.70ct Yellow Rutile Topaz, Oval, Transparent

11.1 x 8.3 mm

$ 76.78

View Gem
1.79ctw Orange Morganite, Oval, VVS-VS

1.79ctw Orange Morganite, Oval, VVS-VS

8 x 5.7 mm

$ 107.87

View Gem
13.81ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450375)

13.81ct Blue Aquamarine, Emerald Cut, VVS

18.4 x 10.3 mm

$ 3,026.05

View Gem
4.35ct Pink Morganite, Pear Shape, Transparent

4.35ct Pink Morganite, Pear Shape, Transparent

15.3 x 9.2 mm

$ 49.99

View Gem
0.65ct Purple Spinel, Cushion, VS

0.65ct Purple Spinel, Cushion, VS

5 x 5 mm (calibrated)

$ 32.37

View Gem
0.28ct Black Diamond, Square, Opaque

0.28ct Black Diamond, Square, Opaque

3 x 3 mm (calibrated)

$ 139.44

View Gem
2.59ct Pink Morganite, Marquise, Translucent

2.59ct Pink Morganite, Marquise, Translucent

13.6 x 6.2 mm

$ 28.38

View Gem
0.71ct Gray Spinel, Cushion, VVS-VS

0.71ct Gray Spinel, Cushion, VVS-VS

5.2 x 4.7 mm

$ 58.93

View Gem
1 2 3
...
79
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

good navigation and simple interface.

Posted By Dave in April, 2026
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 selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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

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