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
3.78ct Yellow Apatite, Pear Shape, VS-SI

3.78ct Yellow Apatite, Pear Shape, VS-SI

12.4 x 9.1 mm

$ 202.23

View Gem
26.03ct Green Bloodstone, Oval, Opaque

26.03ct Green Bloodstone, Oval, Opaque

18.2 x 14.5 mm

$ 51.85

View Gem
4.94ct Pink Rose Quartz, Emerald Cut, Transparent

4.94ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 27.06

View Gem
4.29ctw Red Pyrope Garnet, Marquise, VVS-VS

4.29ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 47.14

View Gem
1.42ct Purple Spinel, Oval, VS
Spinel Product Video (349394)

1.42ct Purple Spinel, Oval, VS

7.4 x 6.2 mm

$ 235.72

View Gem
20.10ctw Multicolor Jasper, Oval, Opaque

20.10ctw Multicolor Jasper, Oval, Opaque

16 x 12 mm (calibrated)

$ 22.02

View Gem
41.53ct Green Amazonite, Oval, Opaque

41.53ct Green Amazonite, Oval, Opaque

31.7 x 25.7 mm

$ 33.08

View Gem
14.59ctw Black Spinel, Heart, Opaque

14.59ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 79.93

View Gem
1.65ct Yellow Citrine, Heart, VVS

1.65ct Yellow Citrine, Heart, VVS

8 x 8 mm (calibrated)

$ 11.50

View Gem
2.42ct Orange Zircon, Oval, VVS

2.42ct Orange Zircon, Oval, VVS

7 x 6.3 mm

$ 55.24

View Gem
1.92ct Orange Moonstone, Trillion, Translucent

1.92ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.83

View Gem
8.15ct Multicolor Amethyst Geode Slice, Fancy, Transparent

8.15ct Multicolor Amethyst Geode Slice, Fancy, Transparent

17.8 x 11.6 mm

$ 8.68

View Gem
0.84ct Blue Kyanite, Oval, SI

0.84ct Blue Kyanite, Oval, SI

6.4 x 4.3 mm

$ 18.41

View Gem
1.05ct Blue Kyanite, Oval, SI

1.05ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 26.15

View Gem
1.32ct Green Sphene, Oval, Transparent

1.32ct Green Sphene, Oval, Transparent

6.9 x 6 mm

$ 6.57

View Gem
0.83ctw Yellow Citrine, Oval, VVS-VS

0.83ctw Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 5.46

View Gem
8.56ctw Brown Tiger'S Eye, Round, Opaque

8.56ctw Brown Tiger'S Eye, Round, Opaque

10 mm (calibrated)

$ 8.52

View Gem
2.37ct Green Peridot, Cushion, VS-SI

2.37ct Green Peridot, Cushion, VS-SI

8.4 x 6.8 mm

$ 93.33

View Gem
1.70ct Yellow Citrine, Trillion, Transparent

1.70ct Yellow Citrine, Trillion, Transparent

8 x 8 mm (calibrated)

$ 13.04

View Gem
27.20ct Multicolor Pietersite, Oval, Opaque

27.20ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 119.20

View Gem
12.31ctw Brown Hessonite Garnet, Oval, Translucent

12.31ctw Brown Hessonite Garnet, Oval, Translucent

13 x 10 mm

$ 67.44

View Gem
0.76ct Green Peridot, Oval, VVS-VS

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.30

View Gem
2.40ct Green Tourmaline, Oval, Transparent

2.40ct Green Tourmaline, Oval, Transparent

8.6 x 6.9 mm

$ 41.13

View Gem
1.59ct Blue Kyanite, Oval, SI

1.59ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 31.67

View Gem
1 2 3
...
139
Choose Page
1 - 1883

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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

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