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
6.33ct Blue Chalcedony, Cushion, Translucent

6.33ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 23.65

View Gem
0.59ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.59ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.6 x 4.4 mm

$ 31.14

View Gem
19.79ct Multicolor Jasper, Pear Shape, Opaque

19.79ct Multicolor Jasper, Pear Shape, Opaque

25.8 x 19.2 mm

$ 21.68

View Gem
1.47ct Yellow Beryl, Round, VVS

1.47ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 29.28

View Gem
1.82ct Orange Moonstone, Marquise, Translucent

1.82ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.63

View Gem
28.66ct Brown Tiger'S Eye, Oval, Opaque

28.66ct Brown Tiger'S Eye, Oval, Opaque

25 x 18 mm (calibrated)

$ 28.54

View Gem
2.60ct Red Almandine Garnet, Oval, VVS

2.60ct Red Almandine Garnet, Oval, VVS

10 x 8 mm (calibrated)

$ 97.11

View Gem
1.34ct Orange Hessonite Garnet, Oval, VS

1.34ct Orange Hessonite Garnet, Oval, VS

7.4 x 6 mm

$ 26.69

View Gem
5.71ctw Pink Strawberry Quartz, Oval, Transparent

5.71ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 42.43

View Gem
3.42ct Blue Chalcedony, Oval, Transparent

3.42ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 6.81

View Gem
20.86ctw Green Aventurine, Marquise, Translucent
Aventurine Product Video (595164)

20.86ctw Green Aventurine, Marquise, Translucent

26.4 x 12.7 mm

$ 45.71

View Gem
0.97ct Green Peridot, Emerald Cut, VS

0.97ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 15.45

View Gem
4.70ct Pink Strawberry Quartz, Oval, Translucent

4.70ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 56.17

View Gem
6.02ct Brown Tiger'S Eye, Oval, Opaque

6.02ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 5.99

View Gem
1.52ct Green Sphene, Oval, Transparent

1.52ct Green Sphene, Oval, Transparent

7.4 x 6.1 mm

$ 7.57

View Gem
6.00ct Black Star Diopside, Round, Opaque

6.00ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 29.88

View Gem
2.32ct Brown Tiger'S Eye, Round, Opaque

2.32ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 2.31

View Gem
6.51ct Multicolor Cinnabar, Oval, Opaque

6.51ct Multicolor Cinnabar, Oval, Opaque

16.7 x 11.9 mm

$ 7.62

View Gem
10.84ct Yellow Color-Change Diaspore, Oval, VS-SI
Color-Change Diaspore Product Video (381562)

10.84ct Yellow Color-Change Diaspore, Oval, VS-SI

14.7 x 12.4 mm

$ 4,083.93

View Gem
9.51ct Multicolor Coral, Pear Shape, Translucent

9.51ct Multicolor Coral, Pear Shape, Translucent

18.9 x 14.6 mm

$ 30.11

View Gem
12.33ct White Rainbow Moonstone, Marquise, Transparent

12.33ct White Rainbow Moonstone, Marquise, Transparent

25.8 x 9.9 mm

$ 184.21

View Gem
31.54ct Multicolor Jasper, Oval, Opaque

31.54ct Multicolor Jasper, Oval, Opaque

31.3 x 20.4 mm

$ 17.28

View Gem
15.60ctw Multicolor Jasper, Pear Shape, Opaque

15.60ctw Multicolor Jasper, Pear Shape, Opaque

20 x 12.9 mm

$ 8.86

View Gem
0.55ct Green Peridot, Marquise, VS

0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

View Gem
1 2 3
...
189
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 -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.

Posted By MMM in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

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