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
25.46ct Violet Amethyst, Round, VVS

25.46ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 202.87

View Gem
7.77ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (648824)

7.77ct Violet Amethyst, Pear Shape, VVS

16.2 x 12.9 mm

$ 54.17

View Gem
26.24ctw Multicolor Fossil Coral, Oval, Opaque

26.24ctw Multicolor Fossil Coral, Oval, Opaque

21.3 x 13.2 mm

$ 33.92

View Gem
1.80ct Green Peridot, Cushion, VS-SI

1.80ct Green Peridot, Cushion, VS-SI

8 x 6.7 mm

$ 70.60

View Gem
12.57ct Violet Amethyst, Flower Cut, Translucent

12.57ct Violet Amethyst, Flower Cut, Translucent

21 x 14.5 mm

$ 37.56

View Gem
15.01ctw Green Prehnite, Fancy, Transparent

15.01ctw Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 23.51

View Gem
1.84ct Pink Morganite, Round, VS

1.84ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 141.12

View Gem
24.65ct Brown Moonstone, Round, Translucent

24.65ct Brown Moonstone, Round, Translucent

18 mm (calibrated)

$ 49.10

View Gem
2.20ct Green Peridot, Oval, VS
Peridot Product Video (438077)

2.20ct Green Peridot, Oval, VS

8.5 x 6.8 mm

$ 76.69

View Gem
97.36ctw Purple Tourmaline, Fancy, Translucent
Tourmaline Product Video (666911)

97.36ctw Purple Tourmaline, Fancy, Translucent

43.6 x 29.3 mm

$ 1,454.56

View Gem
5.67ct Violet Amethyst, Round, Transparent

5.67ct Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 39.53

View Gem
185.63ct Multicolor Agate, Oval, Opaque
Agate Product Video (692421)

185.63ct Multicolor Agate, Oval, Opaque

35.9 x 33.2 mm

$ 92.44

View Gem
7.30ct Yellow Rutile Quartz, Pear Shape, Transparent

7.30ct Yellow Rutile Quartz, Pear Shape, Transparent

15.1 x 11.1 mm

$ 19.83

View Gem
28.69ct White Scolecite, Pear Shape, Opaque

28.69ct White Scolecite, Pear Shape, Opaque

34.9 x 23.1 mm

$ 33.96

View Gem
1.89ct Multicolor Opal, Oval, Translucent

1.89ct Multicolor Opal, Oval, Translucent

12 x 8 mm (calibrated)

$ 47.06

View Gem
1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

6.1 x 5.5 mm

$ 67.23

View Gem
1.69ct Pink Morganite, Oval, VS

1.69ct Pink Morganite, Oval, VS

9 x 7 mm (calibrated)

$ 117.83

View Gem
2.35ct Pink Strawberry Quartz, Round, Translucent

2.35ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.36

View Gem
0.06ct Black Diamond, Round, Opaque
Diamond Product Video (702346)

0.06ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 15.94

View Gem
1.05ct Violet Spinel, Baguette, VS

1.05ct Violet Spinel, Baguette, VS

7.6 x 4.9 mm

$ 37.55

View Gem
0.85ctw Green Peridot, Pear Shape, VVS-VS

0.85ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.45

View Gem
44.18ct Green Idocrase, Oval, Opaque

44.18ct Green Idocrase, Oval, Opaque

32.7 x 25.4 mm

$ 18.33

View Gem
17.71ctw Brown Tiger'S Eye, Cushion, Opaque

17.71ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 16.17

View Gem
39.39ct Green Amazonite, Fancy, Opaque

39.39ct Green Amazonite, Fancy, Opaque

40.5 x 11.6 mm

$ 7.85

View Gem
1 2 3
...
44
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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

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

Very large selection from affordable to high end I will be coming back to shop again!

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