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
1.90ct Multicolor Opal, Pear Shape, Transparent

1.90ct Multicolor Opal, Pear Shape, Transparent

13 x 9 mm (calibrated)

$ 83.27

View Gem
1.12ct Blue Kyanite, Oval, VS-SI

1.12ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 23.31

View Gem
1.24ct Pink Morganite, Round, VS

1.24ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 48.16

View Gem
2.80ct Brown Rutile Topaz, Pear Shape, Transparent

2.80ct Brown Rutile Topaz, Pear Shape, Transparent

10.8 x 7.9 mm

$ 58.10

View Gem
27.47ct Gray Obsidian, Oval, Opaque

27.47ct Gray Obsidian, Oval, Opaque

30.5 x 21 mm

$ 21.67

View Gem
20.89ct Multicolor Rainbow Pyrite, Trillion, Opaque

20.89ct Multicolor Rainbow Pyrite, Trillion, Opaque

22.7 x 21.3 mm

$ 54.09

View Gem
3.35ct Yellow Rutile Quartz, Marquise, Transparent

3.35ct Yellow Rutile Quartz, Marquise, Transparent

13.8 x 6.9 mm

$ 9.02

View Gem
4.66ct Purple Rhodolite Garnet, Oval, VVS-VS

4.66ct Purple Rhodolite Garnet, Oval, VVS-VS

10.4 x 9.1 mm

$ 193.39

View Gem
0.77ct Orange Sphalerite, Round, SI

0.77ct Orange Sphalerite, Round, SI

5.2 mm

$ 38.35

View Gem
2.34ct Violet Sapphire, Oval, VS-SI
Sapphire Product Video (746899)

2.34ct Violet Sapphire, Oval, VS-SI

9.5 x 7.8 mm

$ 936.00

View Gem
32.56ct Purple Kunzite, Pear Shape, Translucent
Kunzite Product Video (471041)

32.56ct Purple Kunzite, Pear Shape, Translucent

23.8 x 16.4 mm

$ 107.02

View Gem
0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.6 mm (calibrated)

$ 23.96

View Gem
2.50ct Green Peridot, Cushion, VS

2.50ct Green Peridot, Cushion, VS

8.5 x 7.1 mm

$ 99.07

View Gem
1.40ct Multicolor Opal, Pear Shape, Transparent

1.40ct Multicolor Opal, Pear Shape, Transparent

11.1 x 8 mm

$ 65.95

View Gem
2.58ctw Yellow Citrine, Emerald Cut, VVS

2.58ctw Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 20.56

View Gem
2.40ct Blue Aquamarine, Oval, VS
Aquamarine Product Video (757081)

2.40ct Blue Aquamarine, Oval, VS

10 x 8 mm (calibrated)

$ 288.00

View Gem
3.70ctw Orange Hessonite Garnet, Emerald Cut, VS
Hessonite Garnet Product Video (392145)

3.70ctw Orange Hessonite Garnet, Emerald Cut, VS

6.5 x 4.8 mm

$ 81.07

View Gem
12.95ct White Rainbow Moonstone, Marquise, Transparent

12.95ct White Rainbow Moonstone, Marquise, Transparent

25.5 x 11.4 mm

$ 96.81

View Gem
2.96ct Brown Cat'S Eye Scapolite, Oval, Translucent

2.96ct Brown Cat'S Eye Scapolite, Oval, Translucent

9 x 7 mm (calibrated)

$ 16.22

View Gem
4.90ct Violet Amethyst, Pear Shape, VVS-VS

4.90ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 31.05

View Gem
0.58ct Orange Spessartite Garnet, Oval, VS-SI

0.58ct Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.3 mm

$ 20.22

View Gem
2.61ctw Green Peridot, Pear Shape, VVS-VS

2.61ctw Green Peridot, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 25.74

View Gem
8.20ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (700584)

8.20ct Multicolor Agate, Sphere / Ball, Opaque

10 mm (calibrated)

$ 6.53

View Gem
1.95ct Orange Hessonite Garnet, Oval, VS

1.95ct Orange Hessonite Garnet, Oval, VS

8.6 x 7 mm

$ 42.73

View Gem
1 2 3
...
170
Choose Page
1 - 1857

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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer 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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image