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
4.48ct Pink Morganite, Oval, Transparent

4.48ct Pink Morganite, Oval, Transparent

11 x 9 mm (calibrated)

$ 18.59

View Gem
0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 71.71

View Gem
0.53ct Pink Spinel, Round, VS

0.53ct Pink Spinel, Round, VS

5 mm (calibrated)

$ 39.59

View Gem
0.10ct Black Diamond, Round, Opaque

0.10ct Black Diamond, Round, Opaque

2.8 mm (calibrated)

$ 34.23

View Gem
12.44ctw Black Spinel, Round, Opaque

12.44ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 38.70

View Gem
0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2 mm (calibrated)

$ 26.15

View Gem
8.38ctw Black Spinel, Round, Opaque

8.38ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 32.13

View Gem
3.25ct White Topaz, Oval, VVS-VS

3.25ct White Topaz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 17.81

View Gem
0.63ct Pink Morganite, Oval, VS

0.63ct Pink Morganite, Oval, VS

7 x 5 mm (calibrated)

$ 27.61

View Gem
2.55ct Yellow Rutile Topaz, Heart, Transparent

2.55ct Yellow Rutile Topaz, Heart, Transparent

8.7 x 8.3 mm

$ 52.91

View Gem
0.91ct Pink Morganite, Pear Shape, VVS-VS

0.91ct Pink Morganite, Pear Shape, VVS-VS

11.6 x 4.8 mm

$ 79.76

View Gem
0.99ct Yellow Beryl, Oval, VS

0.99ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 18.90

View Gem
0.54ct Pink Morganite, Oval, VS

0.54ct Pink Morganite, Oval, VS

5.9 x 4.5 mm

$ 22.41

View Gem
0.60ct Gray Spinel, Cushion, VS

0.60ct Gray Spinel, Cushion, VS

4.7 x 4.6 mm

$ 49.80

View Gem
1.14ctw White Topaz, Square, VVS-VS

1.14ctw White Topaz, Square, VVS-VS

4.5 x 4.4 mm

$ 7.95

View Gem
0.49ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.49ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.9 x 3.4 mm

$ 81.34

View Gem
0.93ct Pink Morganite, Oval, VS

0.93ct Pink Morganite, Oval, VS

7.2 x 5.7 mm

$ 81.51

View Gem
0.85ct Yellow Morganite, Pear Shape, VS

0.85ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 37.25

View Gem
0.62ct Green Chrysoberyl Cat'S Eye, Round, Translucent

0.62ct Green Chrysoberyl Cat'S Eye, Round, Translucent

5 mm (calibrated)

$ 18.53

View Gem
3.59ct Pink Morganite, Pear Shape, Transparent

3.59ct Pink Morganite, Pear Shape, Transparent

14.2 x 8.2 mm

$ 14.90

View Gem
0.59ct Purple Spinel, Round, VS

0.59ct Purple Spinel, Round, VS

4.7 mm

$ 30.93

View Gem
0.84ct Pink Morganite, Pear Shape, VS-SI

0.84ct Pink Morganite, Pear Shape, VS-SI

7.3 x 5.7 mm

$ 36.81

View Gem
0.06ct White Diamond, Marquise, VVS

0.06ct White Diamond, Marquise, VVS

3.9 x 1.9 mm

$ 208.54

View Gem
1.50ct Yellow Beryl, Trillion, VS

1.50ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 35.86

View Gem
1 2 3
...
127
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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image