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
33.71ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (523722)

33.71ct Multicolor Boulder Opal, Fancy, Opaque

32.6 x 22.1 mm

$ 184.67

View Gem
14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 16.35

View Gem
20.43ct Yellow Apatite, Emerald Cut, VS-SI
Apatite Product Video (384010)

20.43ct Yellow Apatite, Emerald Cut, VS-SI

18 x 13 mm (calibrated)

$ 610.45

View Gem
8.89ct Brown Smoky Quartz, Emerald Cut, VVS-VS

8.89ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 48.70

View Gem
98.16ct Multicolor Moss Agate, Pear Shape, Opaque
Moss Agate Product Video (695139)

98.16ct Multicolor Moss Agate, Pear Shape, Opaque

53.6 x 36.1 mm

$ 78.22

View Gem
11.45ctw Green Tourmaline, Fancy, Translucent
Tourmaline Product Video (472934)

11.45ctw Green Tourmaline, Fancy, Translucent

19 x 10.3 mm

$ 104.54

View Gem
9.32ct Pink Morganite, Pear Shape, Transparent
Morganite Product Video (606004)

9.32ct Pink Morganite, Pear Shape, Transparent

20.6 x 11 mm

$ 102.11

View Gem
12.95ct Brown Smoky Quartz, Round, Transparent

12.95ct Brown Smoky Quartz, Round, Transparent

16 mm (calibrated)

$ 42.57

View Gem
6.49ct Pink Morganite, Oval, Transparent

6.49ct Pink Morganite, Oval, Transparent

14 x 10 mm (calibrated)

$ 64.64

View Gem
16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

23.4 x 14 mm

$ 110.51

View Gem
13.90ctw Brown Smoky Quartz, Oval, VVS

13.90ctw Brown Smoky Quartz, Oval, VVS

14 x 12 mm (calibrated)

$ 53.03

View Gem
5.38ctw Orange Hessonite Garnet, Cushion, VS-SI

5.38ctw Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 89.31

View Gem
23.78ct Green Maw-Sit-Sit, Round, Opaque

23.78ct Green Maw-Sit-Sit, Round, Opaque

16 mm (calibrated)

$ 78.15

View Gem
26.04ct Green Amazonite, Oval, Opaque
Amazonite Product Video (484654)

26.04ct Green Amazonite, Oval, Opaque

26.4 x 13.6 mm

$ 17.29

View Gem
17.33ct Turquoise Grandidierite, Pear Shape, SI
Grandidierite Product Video (470657)

17.33ct Turquoise Grandidierite, Pear Shape, SI

17.6 x 16.4 mm

$ 7,911.15

View Gem
22.83ct Gray Hematite, Heart, Opaque

22.83ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 50.03

View Gem
5.04ct Orange Sphalerite, Emerald Cut, SI-I1
Sphalerite Product Video (690765)

5.04ct Orange Sphalerite, Emerald Cut, SI-I1

11 x 7.4 mm

$ 250.99

View Gem
1.37ct Yellow Color-Change Diaspore, Cushion, VS

1.37ct Yellow Color-Change Diaspore, Cushion, VS

8.1 x 5.2 mm

$ 67.55

View Gem
1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366561)

1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS

8.2 x 5.6 mm

$ 131.69

View Gem
1.56ct Green Sphene, Pear Shape, VS-SI
Sphene Product Video (467956)

1.56ct Green Sphene, Pear Shape, VS-SI

7.9 x 6.6 mm

$ 76.91

View Gem
38.28ct Black Tourmaline, Emerald Cut, Opaque

38.28ct Black Tourmaline, Emerald Cut, Opaque

27.8 x 14.3 mm

$ 158.86

View Gem
14.24ct Black Tourmaline, Pear Shape, Opaque

14.24ct Black Tourmaline, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 59.10

View Gem
8.65ct Green Amazonite, Marquise, Opaque

8.65ct Green Amazonite, Marquise, Opaque

18.9 x 10.2 mm

$ 17.29

View Gem
20.96ctw Brown Smoky Quartz, Marquise, Transparent
Smoky Quartz Product Video (619199)

20.96ctw Brown Smoky Quartz, Marquise, Transparent

19.7 x 12.5 mm

$ 87.96

View Gem
1 2 3
...
15
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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

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