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
1.54ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (754863)

1.54ct Purple Spinel, Cushion, VVS-VS

7.7 x 6.4 mm

$ 153.38

View Gem
2.93ct Violet Amethyst, Trillion, VVS-VS

2.93ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.43

View Gem
0.62ct Violet Amethyst, Emerald Cut, VS

0.62ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.60

View Gem
2.98ct Yellow Citrine, Oval, VVS

2.98ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 16.33

View Gem
0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

View Gem
3.29ctw Brown Smoky Quartz, Round, VS

3.29ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.21

View Gem
4.85ct Green Seraphinite, Round, Opaque
Seraphinite Product Video (508721)

4.85ct Green Seraphinite, Round, Opaque

12 mm (calibrated)

$ 4.69

View Gem
0.65ct Green Tourmaline, Baguette, VVS-VS

0.65ct Green Tourmaline, Baguette, VVS-VS

7.8 x 3.1 mm

$ 22.66

View Gem
8.99ct Brown Tiger'S Eye, Cushion, Opaque

8.99ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 11.64

View Gem
1.42ct Purple Spinel, Cushion, VS

1.42ct Purple Spinel, Cushion, VS

6.7 x 6.3 mm

$ 97.08

View Gem
4.43ct Yellow Citrine, Oval, VVS-VS

4.43ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 33.97

View Gem
7.15ctw Green Amazonite, Round, Opaque

7.15ctw Green Amazonite, Round, Opaque

7 mm (calibrated)

$ 17.46

View Gem
0.93ct Orange Hessonite Garnet, Pear Shape, SI

0.93ct Orange Hessonite Garnet, Pear Shape, SI

7.5 x 5.2 mm

$ 20.38

View Gem
11.34ct Gray Jadeite, Oval, Translucent

11.34ct Gray Jadeite, Oval, Translucent

17.3 x 12 mm

$ 37.27

View Gem
1.32ct Multicolor Pietersite, Pear Shape, Opaque

1.32ct Multicolor Pietersite, Pear Shape, Opaque

8.8 x 5.4 mm

$ 3.12

View Gem
10.59ct Multicolor Pietersite, Trillion, Opaque

10.59ct Multicolor Pietersite, Trillion, Opaque

18 x 18 mm (calibrated)

$ 35.16

View Gem
1.66ct Orange Hessonite Garnet, Oval, VS

1.66ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.6 mm

$ 30.92

View Gem
8.27ct Green Prehnite, Fancy, Translucent

8.27ct Green Prehnite, Fancy, Translucent

15.6 x 11.3 mm

$ 13.59

View Gem
3.20ct Yellow Rutile Topaz, Pear Shape, Transparent

3.20ct Yellow Rutile Topaz, Pear Shape, Transparent

13.2 x 7.9 mm

$ 66.40

View Gem
0.66ct Purple Spinel, Cushion, VVS

0.66ct Purple Spinel, Cushion, VVS

5.8 x 4.7 mm

$ 54.78

View Gem
1.40ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.40ct Yellow Color-Change Diaspore, Emerald Cut, VS

11.6 x 4.2 mm

$ 73.90

View Gem
3.99ctw Red Pyrope Garnet, Marquise, VVS

3.99ctw Red Pyrope Garnet, Marquise, VVS

12.1 x 6.1 mm

$ 34.97

View Gem
0.75ct Pink Tourmaline, Oval, Transparent

0.75ct Pink Tourmaline, Oval, Transparent

6.2 x 5 mm

$ 29.88

View Gem
36.32ctw Multicolor Rutile Quartz, Sphere / Ball, Translucent

36.32ctw Multicolor Rutile Quartz, Sphere / Ball, Translucent

8.5 mm

$ 39.79

View Gem
1 2 3
...
72
Choose Page
1 - 1858

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

Ia've been searching for a source to get my gemstones for awhile now and was very happy to come across this website. Amazing variety for any income.

Posted By Tarah in August, 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

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

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

Overall Rating -> 10 star ratings

It was great

Posted By Nik in June, 2026
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 -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image