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
16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

23.4 x 14 mm

$ 110.51

View Gem
21.94ct Blue Chalcedony, Pear Shape, Opaque

21.94ct Blue Chalcedony, Pear Shape, Opaque

27 x 20 mm (calibrated)

$ 45.53

View Gem
11.45ctw Green Tourmaline, Fancy, Translucent
Tourmaline Product Video (472934)

11.45ctw Green Tourmaline, Fancy, Translucent

19 x 10.3 mm

$ 104.54

View Gem
3.56ct Green Sphene, Oval, Translucent

3.56ct Green Sphene, Oval, Translucent

10.5 x 8.3 mm

$ 21.33

View Gem
11.09ct Multicolor Coral, Round, Translucent

11.09ct Multicolor Coral, Round, Translucent

17 mm (calibrated)

$ 24.30

View Gem
14.47ct Green Druzy Variscite, Trillion, Opaque

14.47ct Green Druzy Variscite, Trillion, Opaque

35.4 x 17 mm

$ 61.40

View Gem
4.39ctw Pink Strawberry Quartz, Round, Translucent

4.39ctw Pink Strawberry Quartz, Round, Translucent

8.5 mm (calibrated)

$ 67.34

View Gem
68.84ct Green Malachite, Square, Opaque
Malachite Product Video (669074)

68.84ct Green Malachite, Square, Opaque

25 x 24.3 mm

$ 68.57

View Gem
0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.6 mm (calibrated)

$ 254.36

View Gem
27.76ct Black Nuummite, Oval, Opaque

27.76ct Black Nuummite, Oval, Opaque

20.1 x 16.2 mm

$ 113.91

View Gem
23.51ct Green Prehnite, Fancy, Translucent

23.51ct Green Prehnite, Fancy, Translucent

22.4 x 14.1 mm

$ 40.70

View Gem
12.38ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (485809)

12.38ct Green Actinolite Cat'S Eye, Oval, Translucent

16.5 x 13.5 mm

$ 86.31

View Gem
63.97ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (471274)

63.97ct Multicolor Rhodochrosite, Oval, Opaque

39.9 x 25.6 mm

$ 109.33

View Gem
1.55ct Purple Spinel, Cushion, VS

1.55ct Purple Spinel, Cushion, VS

6.6 x 6.2 mm

$ 110.39

View Gem
6.02ct Brown Smoky Quartz, Flower Cut, Transparent

6.02ct Brown Smoky Quartz, Flower Cut, Transparent

14.1 x 10 mm

$ 22.36

View Gem
7.76ct Purple Kunzite, Pear Shape, VVS
Kunzite Product Video (693457)

7.76ct Purple Kunzite, Pear Shape, VVS

13 x 10.7 mm

$ 213.55

View Gem
2.44ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.44ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.7 x 7.3 mm

$ 40.10

View Gem
1.35ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

1.35ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

10.5 x 3.7 mm

$ 72.60

View Gem
24.38ctw Purple Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (522378)

24.38ctw Purple Tourmaline, Flower Cut, Transparent

19.2 x 17.3 mm

$ 101.18

View Gem
7.50ct Multicolor Fire Agate, Fancy, Translucent
Fire Agate Product Video (623668)

7.50ct Multicolor Fire Agate, Fancy, Translucent

13.8 x 11.1 mm

$ 105.68

View Gem
25.82ct Brown Rutile Quartz, Marquise, Transparent
Rutile Quartz Product Video (402579)

25.82ct Brown Rutile Quartz, Marquise, Transparent

31.1 x 13.8 mm

$ 90.80

View Gem
12.05ct Violet Charoite, Pear Shape, Opaque
Charoite Product Video (666097)

12.05ct Violet Charoite, Pear Shape, Opaque

28.2 x 12.7 mm

$ 34.30

View Gem
1.08ct Green Peridot, Pear Shape, VS
Peridot Product Video (526451)

1.08ct Green Peridot, Pear Shape, VS

8 x 6 mm (calibrated)

$ 15.49

View Gem
1.58ct White Sillimanite Cat'S Eye, Oval, Transparent

1.58ct White Sillimanite Cat'S Eye, Oval, Transparent

5.9 x 5.6 mm

$ 6.29

View Gem
1 2 3
...
15
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

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

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