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
1.19ct Yellow Beryl, Oval, VVS-VS

1.19ct Yellow Beryl, Oval, VVS-VS

9 x 6.7 mm

$ 23.70

View Gem
0.65ct Yellow Beryl, Cushion, VS

0.65ct Yellow Beryl, Cushion, VS

6 x 6 mm (calibrated)

$ 15.54

View Gem
3.46ctw Multicolor Andalusite, Oval, VS
Andalusite Product Video (390967)

3.46ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 185.51

View Gem
0.52ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.52ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4 mm

$ 107.90

View Gem
13.84ctw Black Spinel, Round, Opaque

13.84ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 45.48

View Gem
2.01ctw Pink Morganite, Oval, VS

2.01ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 110.11

View Gem
0.83ct Yellow Morganite, Pear Shape, VVS

0.83ct Yellow Morganite, Pear Shape, VVS

7.7 x 5.7 mm

$ 36.37

View Gem
7.04ctw Black Spinel, Round, Opaque

7.04ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 23.14

View Gem
0.95ct Purple Spinel, Cushion, VS

0.95ct Purple Spinel, Cushion, VS

6.1 x 5.3 mm

$ 66.94

View Gem
0.10ctw White Diamond, Marquise, VVS

0.10ctw White Diamond, Marquise, VVS

4.1 x 1.9 mm

$ 347.56

View Gem
0.58ct Purple Spinel, Cushion, VS

0.58ct Purple Spinel, Cushion, VS

5.1 x 4.6 mm

$ 40.44

View Gem
0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 23.90

View Gem
1.84ct Yellow Beryl, Cushion, VS

1.84ct Yellow Beryl, Cushion, VS

9 x 7 mm (calibrated)

$ 40.32

View Gem
3.57ctw White Topaz, Square, VS-SI

3.57ctw White Topaz, Square, VS-SI

3.5 x 3.5 mm

$ 27.38

View Gem
2.97ct Pink Morganite, Marquise, Translucent

2.97ct Pink Morganite, Marquise, Translucent

14.5 x 6.9 mm

$ 32.54

View Gem
1.89ctw Yellow Beryl, Oval, VVS-VS

1.89ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 41.42

View Gem
1.64ct Purple Spinel, Cushion, VS

1.64ct Purple Spinel, Cushion, VS

7 x 5.9 mm

$ 102.48

View Gem
12.77ctw Black Spinel, Round, Opaque

12.77ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 39.74

View Gem
0.85ct Yellow Beryl, Trillion, VS

0.85ct Yellow Beryl, Trillion, VS

6.9 x 6.7 mm

$ 20.32

View Gem
1.01ct Yellow Chrysoberyl, Pear Shape, VVS

1.01ct Yellow Chrysoberyl, Pear Shape, VVS

7.5 x 6.1 mm

$ 117.69

View Gem
3.05ctw White Topaz, Cushion, VVS-VS

3.05ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.72

View Gem
5.62ct Brown Rutile Topaz, Heart, Transparent

5.62ct Brown Rutile Topaz, Heart, Transparent

12.3 x 11.1 mm

$ 116.62

View Gem
0.04ct White Diamond, Round, VVS

0.04ct White Diamond, Round, VVS

2.2 mm (calibrated)

$ 92.69

View Gem
0.66ct Purple Spinel, Cushion, VS

0.66ct Purple Spinel, Cushion, VS

5.3 x 4.6 mm

$ 46.02

View Gem
1 2 3
...
56
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

The stones are very nice.

Posted By Mvk in August, 2025
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 -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

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