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
23.80ct Orange Spessartite Garnet, Oval, SI
Spessartite Garnet Product Video (487522)

23.80ct Orange Spessartite Garnet, Oval, SI

10 x 13.7 mm

$ 1,043.01

View Gem
23.76ct Black Nuummite, Oval, Opaque

23.76ct Black Nuummite, Oval, Opaque

19.2 x 16.8 mm

$ 97.50

View Gem
1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

View Gem
0.17ct Yellow Diamond, Round, VS
Diamond Product Video (543902)

0.17ct Yellow Diamond, Round, VS

3.5 mm (calibrated)

$ 306.68

View Gem
5.55ct Orange Imperial Topaz, Pear Shape, VVS
Imperial Topaz Product Video (346661)

5.55ct Orange Imperial Topaz, Pear Shape, VVS

16.5 x 7.1 mm

$ 3,095.57

View Gem
13.86ctw Green Aventurine, Fancy, Translucent

13.86ctw Green Aventurine, Fancy, Translucent

18.4 x 11.8 mm

$ 30.37

View Gem
4.56ctw Multicolor Spectrolite, Oval, Opaque

4.56ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 17.37

View Gem
30.74ct Brown Moonstone, Oval, Translucent

30.74ct Brown Moonstone, Oval, Translucent

25 x 18.9 mm

$ 50.51

View Gem
9.61ct Brown Smoky Quartz, Fancy, VVS

9.61ct Brown Smoky Quartz, Fancy, VVS

16.2 x 14 mm

$ 38.74

View Gem
39.74ct Brown Moonstone, Oval, Opaque

39.74ct Brown Moonstone, Oval, Opaque

25 x 18 mm (calibrated)

$ 65.30

View Gem
7.86ct Yellow Cat'S Eye Opal, Oval, Translucent

7.86ct Yellow Cat'S Eye Opal, Oval, Translucent

15 x 10 mm (calibrated)

$ 14.13

View Gem
43.66ct White Dendritic Agate, Pear Shape, Opaque

43.66ct White Dendritic Agate, Pear Shape, Opaque

43.3 x 22.2 mm

$ 21.75

View Gem
27.15ct Orange Moonstone, Round, Translucent

27.15ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 45.29

View Gem
8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

12.5 x 10 mm

$ 26.63

View Gem
11.21ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (669213)

11.21ct White Rainbow Moonstone, Pear Shape, Transparent

19.2 x 11.7 mm

$ 200.98

View Gem
1.73ct Brown Kornerupine, Emerald Cut, VVS
Kornerupine Product Video (412047)

1.73ct Brown Kornerupine, Emerald Cut, VVS

6.8 x 6.5 mm

$ 143.59

View Gem
19.20ct Multicolor Agate, Oval, Opaque

19.20ct Multicolor Agate, Oval, Opaque

17.8 x 15.6 mm

$ 15.36

View Gem
3.27ct Pink Tourmaline, Emerald Cut, VS-SI
Tourmaline Product Video (545011)

3.27ct Pink Tourmaline, Emerald Cut, VS-SI

10.7 x 6.2 mm

$ 206.00

View Gem
19.12ct Multicolor Quartz With Hedenbergite, Trillion, Transparent
Quartz With Hedenbergite Product Video (604646)

19.12ct Multicolor Quartz With Hedenbergite, Trillion, Transparent

24 x 14.7 mm

$ 78.55

View Gem
13.37ct Pink Morganite, Marquise, VS
Morganite Product Video (594874)

13.37ct Pink Morganite, Marquise, VS

27.5 x 10.9 mm

$ 1,831.02

View Gem
70.42ct Multicolor Jasper, Fancy, Opaque

70.42ct Multicolor Jasper, Fancy, Opaque

46.6 x 31.8 mm

$ 59.40

View Gem
24.86ctw Multicolor Fossil Coral, Cushion, Opaque

24.86ctw Multicolor Fossil Coral, Cushion, Opaque

18.7 x 12.5 mm

$ 53.93

View Gem
25.96ct Multicolor Rainbow Pyrite, Marquise, Opaque

25.96ct Multicolor Rainbow Pyrite, Marquise, Opaque

40 x 14 mm

$ 67.23

View Gem
17.43ct Brown Smoky Quartz, Round, VVS
Smoky Quartz Product Video (503802)

17.43ct Brown Smoky Quartz, Round, VVS

18 mm (calibrated)

$ 57.29

View Gem
1 2 3
...
22
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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

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