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
14.04ctw Black Spinel, Heart, Opaque

14.04ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 76.91

View Gem
28.23ctw Black Spinel, Baguette, Opaque

28.23ctw Black Spinel, Baguette, Opaque

20.2 x 10.2 mm

$ 84.35

View Gem
0.95ct Yellow Beryl, Oval, VVS

0.95ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 18.14

View Gem
0.71ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.71ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.8 x 3.6 mm

$ 147.33

View Gem
3.69ct White Topaz, Round, VVS-VS
Topaz Product Video (390982)

3.69ct White Topaz, Round, VVS-VS

9 mm (calibrated)

$ 28.29

View Gem
0.71ct Pink Morganite, Pear Shape, VVS

0.71ct Pink Morganite, Pear Shape, VVS

9 x 4.2 mm

$ 62.23

View Gem
2.72ct Yellow Golden Beryl, Oval, VS

2.72ct Yellow Golden Beryl, Oval, VS

11 x 9 mm (calibrated)

$ 68.06

View Gem
3.79ctw Multicolor Andalusite, Round, VS

3.79ctw Multicolor Andalusite, Round, VS

3.7 mm

$ 138.72

View Gem
2.50ctw White Topaz, Cushion, VVS-VS

2.50ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 13.70

View Gem
2.41ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (206864)

2.41ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 118.82

View Gem
1.39ct Yellow Beryl, Cushion, VVS

1.39ct Yellow Beryl, Cushion, VVS

8.8 x 6.6 mm

$ 33.22

View Gem
1.30ct Yellow Beryl, Trillion, VVS-VS

1.30ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 31.08

View Gem
1.26ct Purple Spinel, Cushion, VVS

1.26ct Purple Spinel, Cushion, VVS

6.4 x 6.3 mm

$ 68.52

View Gem
1.20ct Purple Spinel, Cushion, VS

1.20ct Purple Spinel, Cushion, VS

6.4 x 5.5 mm

$ 143.42

View Gem
0.92ct Yellow Morganite, Oval, VVS

0.92ct Yellow Morganite, Oval, VVS

7.9 x 5.7 mm

$ 40.32

View Gem
0.81ct White Topaz, Round, VS
Topaz Product Video (691511)

0.81ct White Topaz, Round, VS

5 mm (calibrated)

$ 4.73

View Gem
0.34ct Pink Morganite, Round, VS

0.34ct Pink Morganite, Round, VS

5 mm (calibrated)

$ 14.11

View Gem
0.24ctw White Diamond, Round, VVS-VS
Diamond Product Video (567407)

0.24ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 390.04

View Gem
6.82ctw Black Spinel, Round, Opaque

6.82ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 22.42

View Gem
0.58ct Pink Morganite, Pear Shape, VVS

0.58ct Pink Morganite, Pear Shape, VVS

7.3 x 4.6 mm

$ 31.77

View Gem
1.16ct White Topaz, Oval, Transparent

1.16ct White Topaz, Oval, Transparent

10 x 4.1 mm

$ 6.36

View Gem
0.91ct Yellow Beryl, Oval, VVS-VS

0.91ct Yellow Beryl, Oval, VVS-VS

8 x 5.7 mm

$ 18.13

View Gem
1.05ct Yellow Morganite, Oval, VS

1.05ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 46.02

View Gem
1.92ct Yellow Golden Beryl, Oval, VVS-VS

1.92ct Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 46.27

View Gem
1 2 3
...
54
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

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

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