90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home › Gemstones › Natural Untreated Gemstones

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
1.57ct Green Tourmaline, Emerald Cut, VVS-VS

1.57ct Green Tourmaline, Emerald Cut, VVS-VS

15.1 x 4 mm

$ 43.01

View Gem
4.70ct Violet Amethyst, Trillion, VS-SI

4.70ct Violet Amethyst, Trillion, VS-SI

11 x 11 mm (calibrated)

$ 37.45

View Gem
27.22ct Blue Turquoise, Round, Opaque
Turquoise Product Video (725022)

27.22ct Blue Turquoise, Round, Opaque

21.8 mm

$ 81.33

View Gem
1.84ct Green Tourmaline, Emerald Cut, VVS-VS

1.84ct Green Tourmaline, Emerald Cut, VVS-VS

18.7 x 3.8 mm

$ 40.22

View Gem
10.92ct Multicolor Ruby-Zoisite, Square, Opaque

10.92ct Multicolor Ruby-Zoisite, Square, Opaque

11 x 11 mm (calibrated)

$ 29.91

View Gem
3.82ctw Pink Malaya Garnet, Round, VS
Malaya Garnet Product Video (356351)

3.82ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 125.55

View Gem
0.24ct Orange Sphalerite, Round, SI-I1

0.24ct Orange Sphalerite, Round, SI-I1

3.7 mm

$ 11.95

View Gem
10.58ct Blue Aquamarine, Baguette, VVS
Aquamarine Product Video (467812)

10.58ct Blue Aquamarine, Baguette, VVS

17.5 x 9.7 mm

$ 1,896.78

View Gem
0.44ct Yellow Citrine, Cushion, VVS

0.44ct Yellow Citrine, Cushion, VVS

4.8 x 4.7 mm

$ 3.29

View Gem
2.08ct Orange Hessonite Garnet, Cushion, VS-SI

2.08ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 30.93

View Gem
4.71ct Violet Amethyst, Oval, VVS-VS

4.71ct Violet Amethyst, Oval, VVS-VS

12.6 x 10 mm

$ 37.68

View Gem
1.44ct Green Tourmaline, Emerald Cut, VS-SI

1.44ct Green Tourmaline, Emerald Cut, VS-SI

23.7 x 2.9 mm

$ 37.86

View Gem
12.37ctw Violet Amethyst, Oval, Transparent

12.37ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 67.77

View Gem
14.14ct Brown Tiger'S Eye, Baguette, Opaque

14.14ct Brown Tiger'S Eye, Baguette, Opaque

18.4 x 13.7 mm

$ 14.09

View Gem
26.43ct Brown Jasper, Fancy, Opaque

26.43ct Brown Jasper, Fancy, Opaque

37.3 x 9.6 mm

$ 5.27

View Gem
1.13ct Pink Morganite, Round, VS

1.13ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 86.66

View Gem
0.57ct Green Tourmaline, Round, Transparent

0.57ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 11.35

View Gem
12.41ct Violet Amethyst, Cushion, VVS

12.41ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 86.52

View Gem
1.05ct Red Rhodolite Garnet, Oval, VS

1.05ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 27.89

View Gem
6.14ct Green Actinolite Cat'S Eye, Oval, Translucent

6.14ct Green Actinolite Cat'S Eye, Oval, Translucent

14.3 x 11.1 mm

$ 42.81

View Gem
5.15ctw Purple Rhodolite Garnet, Trillion, VS

5.15ctw Purple Rhodolite Garnet, Trillion, VS

5.2 x 5.2 mm

$ 45.14

View Gem
1.97ct Red Almandine Garnet, Oval, VS

1.97ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 73.58

View Gem
3.57ct Pink Rose Quartz, Emerald Cut, Transparent

3.57ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 19.56

View Gem
0.42ct Blue Kyanite, Round, SI

0.42ct Blue Kyanite, Round, SI

4.3 mm

$ 10.46

View Gem
1 2 3
...
145
Choose Page
1 - 1882

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 -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

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