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
17.76ct Pink Rose Quartz, Oval, Transparent

17.76ct Pink Rose Quartz, Oval, Transparent

18.9 x 14.8 mm

$ 23.35

View Gem
20.21ctw Brown Tiger'S Eye, Flower Cut, Opaque

20.21ctw Brown Tiger'S Eye, Flower Cut, Opaque

15 x 15 mm (calibrated)

$ 24.15

View Gem
15.24ct White Rainbow Moonstone, Pear Shape, Translucent

15.24ct White Rainbow Moonstone, Pear Shape, Translucent

26.7 x 11.5 mm

$ 106.26

View Gem
2.41ct Yellow Citrine, Pear Shape, VVS-VS

2.41ct Yellow Citrine, Pear Shape, VVS-VS

12.3 x 7.6 mm

$ 18.48

View Gem
3.21ctw Brown Smoky Quartz, Round, VS

3.21ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.03

View Gem
10.99ct White Dendritic Agate, Pear Shape, Opaque

10.99ct White Dendritic Agate, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 8.76

View Gem
20.54ctw Multicolor Fossil Coral, Oval, Opaque

20.54ctw Multicolor Fossil Coral, Oval, Opaque

18 x 13 mm (calibrated)

$ 22.05

View Gem
9.35ct Purple Kunzite, Cushion, VVS-VS
Kunzite Product Video (693980)

9.35ct Purple Kunzite, Cushion, VVS-VS

12 x 10 mm (calibrated)

$ 257.31

View Gem
0.81ct Green Tourmaline, Baguette, VVS-VS

0.81ct Green Tourmaline, Baguette, VVS-VS

17.7 x 2.6 mm

$ 28.24

View Gem
2.52ct Orange Hessonite Garnet, Oval, VS

2.52ct Orange Hessonite Garnet, Oval, VS

9.2 x 7.4 mm

$ 46.93

View Gem
7.16ct Green Prehnite, Fancy, Translucent

7.16ct Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 11.76

View Gem
4.98ct Brown Smoky Quartz, Flower Cut, Transparent

4.98ct Brown Smoky Quartz, Flower Cut, Transparent

11.5 x 11.1 mm

$ 20.90

View Gem
10.63ctw Multicolor Jasper, Trillion, Opaque

10.63ctw Multicolor Jasper, Trillion, Opaque

15.8 x 13.9 mm

$ 6.24

View Gem
0.69ct Green Peridot, Marquise, VVS-VS

0.69ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 11.00

View Gem
4.65ctw Yellow Citrine, Oval, VS

4.65ctw Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 25.48

View Gem
2.31ct Orange Hessonite Garnet, Emerald Cut, SI

2.31ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 38.11

View Gem
21.46ct Multicolor Bloodstone, Oval, Opaque

21.46ct Multicolor Bloodstone, Oval, Opaque

17.7 x 12 mm

$ 42.75

View Gem
10.15ct Brown Star Moonstone, Oval, Translucent

10.15ct Brown Star Moonstone, Oval, Translucent

19.3 x 11 mm

$ 33.37

View Gem
0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 29.03

View Gem
15.63ct White Howlite, Trillion, Opaque

15.63ct White Howlite, Trillion, Opaque

21.6 x 17.7 mm

$ 7.32

View Gem
4.03ctw Red Pyrope Garnet, Square, VS

4.03ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.91

View Gem
5.16ct Green Malachite, Oval, Opaque

5.16ct Green Malachite, Oval, Opaque

10.5 x 8.3 mm

$ 3.95

View Gem
2.56ctw Brown Kornerupine, Oval, VVS-VS

2.56ctw Brown Kornerupine, Oval, VVS-VS

6.5 x 4.7 mm

$ 112.19

View Gem
2.43ctw Red Pyrope Garnet, Square, VS

2.43ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 18.63

View Gem
1 2 3
...
58
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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
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 am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image