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
1.83ct Brown Rutile Topaz, Oval, Transparent

1.83ct Brown Rutile Topaz, Oval, Transparent

9.9 x 6 mm

$ 37.97

View Gem
1.63ct Pink Strawberry Quartz, Round, Translucent

1.63ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 9.97

View Gem
0.95ct Blue Kyanite, Round, SI

0.95ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 23.66

View Gem
46.80ct Pink Rose Quartz, Oval, Transparent

46.80ct Pink Rose Quartz, Oval, Transparent

24.2 x 20.9 mm

$ 61.54

View Gem
93.75ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque
Rhodochrosite Product Video (447522)

93.75ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.9 mm

$ 186.75

View Gem
0.80ct Green Peridot, Oval, VS

0.80ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.58

View Gem
1.03ct Multicolor Opal, Oval, Transparent

1.03ct Multicolor Opal, Oval, Transparent

10 x 7 mm (calibrated)

$ 25.65

View Gem
0.63ct Yellow Spessartite Garnet, Oval, VS
Spessartite Garnet Product Video (741451)

0.63ct Yellow Spessartite Garnet, Oval, VS

5.1 x 4.1 mm

$ 20.92

View Gem
1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

9.7 x 4.5 mm

$ 108.46

View Gem
0.63ct Pink Tourmaline, Round, Transparent

0.63ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.10

View Gem
13.63ct Black Tourmaline, Emerald Cut, Opaque

13.63ct Black Tourmaline, Emerald Cut, Opaque

20.2 x 9.7 mm

$ 67.88

View Gem
1.29ct Yellow Citrine, Cushion, VVS

1.29ct Yellow Citrine, Cushion, VVS

8 x 6 mm (calibrated)

$ 9.64

View Gem
26.87ctw Black Spinel, Oval, Opaque

26.87ctw Black Spinel, Oval, Opaque

18 x 13 mm (calibrated)

$ 88.31

View Gem
13.52ct Brown Smoky Quartz, Round, VVS-VS

13.52ct Brown Smoky Quartz, Round, VVS-VS

17 mm (calibrated)

$ 16.44

View Gem
1.32ct Brown Tiger'S Eye, Marquise, Opaque

1.32ct Brown Tiger'S Eye, Marquise, Opaque

10 x 5 mm (calibrated)

$ 1.71

View Gem
10.98ct Multicolor Agate, Oval, Opaque

10.98ct Multicolor Agate, Oval, Opaque

15.1 x 12.4 mm

$ 10.94

View Gem
0.70ct Green Sphene, Oval, VS-SI

0.70ct Green Sphene, Oval, VS-SI

6.3 x 4.6 mm

$ 30.68

View Gem
4.01ctw Red Pyrope Garnet, Square, VVS-VS

4.01ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 27.95

View Gem
10.99ctw Yellow Citrine, Oval, VVS-VS

10.99ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 65.99

View Gem
5.79ct Violet Amethyst, Marquise, VS

5.79ct Violet Amethyst, Marquise, VS

17.8 x 8.8 mm

$ 44.41

View Gem
3.60ctw Violet Amethyst, Heart, VS

3.60ctw Violet Amethyst, Heart, VS

6 x 6 mm (calibrated)

$ 19.72

View Gem
5.43ct Pink Kunzite, Cushion, VVS-VS

5.43ct Pink Kunzite, Cushion, VVS-VS

11 x 9 mm (calibrated)

$ 143.32

View Gem
1.00ct Gray Cat'S Eye Alexandrite, Oval, Opaque

1.00ct Gray Cat'S Eye Alexandrite, Oval, Opaque

4.5 x 6.6 mm

$ 207.50

View Gem
13.07ct Brown Smoky Quartz, Flower Cut, Transparent

13.07ct Brown Smoky Quartz, Flower Cut, Transparent

15 x 15 mm (calibrated)

$ 35.81

View Gem
1 2 3
...
131
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

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

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