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
8.43ctw Yellow Rutile Quartz, Round, Translucent

8.43ctw Yellow Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 23.00

View Gem
8.77ct Brown Tiger'S Eye, Oval, Opaque

8.77ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.15

View Gem
2.61ct Orange Hessonite Garnet, Oval, VS

2.61ct Orange Hessonite Garnet, Oval, VS

9.3 x 7.7 mm

$ 46.45

View Gem
2.86ctw Red Pyrope Garnet, Square, VS

2.86ctw Red Pyrope Garnet, Square, VS

4.5 x 4.5 mm

$ 21.93

View Gem
1.84ct Red Almandine Garnet, Oval, VVS-VS

1.84ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 68.72

View Gem
0.88ct Pink Morganite, Pear Shape, VS

0.88ct Pink Morganite, Pear Shape, VS

9.2 x 5.2 mm

$ 53.03

View Gem
17.66ct Bi-Color Ametrine, Pear Shape, VS

17.66ct Bi-Color Ametrine, Pear Shape, VS

21.9 x 16.6 mm

$ 135.44

View Gem
7.21ctw Yellow Citrine, Pear Shape, VVS-VS

7.21ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 44.79

View Gem
1.34ct Orange Hessonite Garnet, Cushion, VS-SI

1.34ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 5 mm (calibrated)

$ 26.69

View Gem
26.51ct Bi-Color Ametrine, Oval, VS
Ametrine Product Video (590863)

26.51ct Bi-Color Ametrine, Oval, VS

22.3 x 17.6 mm

$ 145.23

View Gem
1.94ct Orange Hessonite Garnet, Emerald Cut, SI

1.94ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 32.01

View Gem
4.33ct Brown Smoky Quartz, Round, VVS-VS

4.33ct Brown Smoky Quartz, Round, VVS-VS

11.5 mm

$ 7.12

View Gem
4.87ct Orange Sunstone, Oval, Translucent

4.87ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 28.97

View Gem
2.39ct Orange Sunstone, Round, Translucent

2.39ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 14.30

View Gem
15.86ct Bi-Color Ametrine, Oval, VVS-VS
Ametrine Product Video (755455)

15.86ct Bi-Color Ametrine, Oval, VVS-VS

16 x 14.7 mm

$ 126.88

View Gem
10.19ct Brown Smoky Quartz, Round, VVS

10.19ct Brown Smoky Quartz, Round, VVS

14 mm (calibrated)

$ 19.98

View Gem
8.89ctw Black Spinel, Round, Opaque

8.89ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 29.22

View Gem
2.76ctw Green Tsavorite Garnet, Round, VS-SI

2.76ctw Green Tsavorite Garnet, Round, VS-SI

2.5 mm (calibrated)

$ 214.37

View Gem
0.89ct Blue Kyanite, Oval, VS

0.89ct Blue Kyanite, Oval, VS

7 x 5 mm (calibrated)

$ 22.16

View Gem
4.80ct Green Tourmaline, Fancy, Translucent

4.80ct Green Tourmaline, Fancy, Translucent

16.1 x 10.1 mm

$ 52.59

View Gem
2.45ct Red Almandine Garnet, Oval, VS

2.45ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 91.51

View Gem
0.91ctw Yellow Citrine, Heart, VVS

0.91ctw Yellow Citrine, Heart, VVS

5.2 x 5.1 mm

$ 6.34

View Gem
1.22ctw Orange Zircon, Oval, VVS-VS

1.22ctw Orange Zircon, Oval, VVS-VS

5.3 x 4.2 mm

$ 30.38

View Gem
0.67ct Yellow Beryl, Oval, VVS-VS

0.67ct Yellow Beryl, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.79

View Gem
1 2 3
...
251
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

It was great! Great photos

Posted By Marcia in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

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