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
1.53ct Orange Sunstone, Oval, Translucent

1.53ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 25.34

View Gem
0.69ct Blue Kyanite, Round, SI

0.69ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 17.18

View Gem
1.27ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.27ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.8 x 4.8 mm

$ 5.06

View Gem
0.53ct Yellow Citrine, Cushion, VS

0.53ct Yellow Citrine, Cushion, VS

5 x 5 mm (calibrated)

$ 3.96

View Gem
29.15ct Pink Coral, Flower Cut, Opaque
Coral Product Video (333717)

29.15ct Pink Coral, Flower Cut, Opaque

25 x 16.7 mm

$ 415.18

View Gem
85.94ct Blue Sodalite, Square, Opaque

85.94ct Blue Sodalite, Square, Opaque

27 x 27.1 mm

$ 71.33

View Gem
5.06ct White Rutile Topaz, Emerald Cut, Transparent
Rutile Topaz Product Video (753628)

5.06ct White Rutile Topaz, Emerald Cut, Transparent

11.4 x 7.5 mm

$ 105.00

View Gem
3.74ctw Red Pyrope Garnet, Heart, VVS-VS

3.74ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 28.68

View Gem
1.33ct Multicolor Labradorite, Oval, Translucent

1.33ct Multicolor Labradorite, Oval, Translucent

7.2 x 6.2 mm

$ 2.65

View Gem
0.92ct Yellow Citrine, Marquise, VS

0.92ct Yellow Citrine, Marquise, VS

9.2 x 5 mm

$ 7.33

View Gem
8.98ctw Yellow Citrine, Oval, VVS-VS

8.98ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 53.92

View Gem
3.03ctw White Topaz, Cushion, VVS-VS

3.03ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.60

View Gem
120.37ct Violet Amethyst, Square, Opaque

120.37ct Violet Amethyst, Square, Opaque

28.7 x 28.2 mm

$ 99.91

View Gem
2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.15

View Gem
0.95ct Green Peridot, Oval, VS

0.95ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.62

View Gem
2.21ct Multicolor Spectrolite, Oval, Opaque

2.21ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.41

View Gem
1.65ct Multicolor Opal, Oval, Transparent

1.65ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 42.89

View Gem
3.07ct Green Prehnite, Oval, Transparent

3.07ct Green Prehnite, Oval, Transparent

8.7 x 8 mm

$ 15.17

View Gem
3.12ctw White Rainbow Moonstone, Pear Shape, Transparent

3.12ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 68.37

View Gem
2.55ctw Yellow Citrine, Emerald Cut, VVS-VS

2.55ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 19.56

View Gem
1.72ct Red Pyrope Garnet, Heart, VVS

1.72ct Red Pyrope Garnet, Heart, VVS

8 x 8 mm (calibrated)

$ 44.54

View Gem
2.66ctw Green Prehnite, Oval, Transparent

2.66ctw Green Prehnite, Oval, Transparent

8.3 x 6.3 mm

$ 14.57

View Gem
6.16ct Multicolor Boulder Opal, Fancy, Opaque

6.16ct Multicolor Boulder Opal, Fancy, Opaque

16.7 x 9.7 mm

$ 30.68

View Gem
21.25ct Multicolor Feather Pyrite, Oval, Opaque

21.25ct Multicolor Feather Pyrite, Oval, Opaque

26.5 x 16.7 mm

$ 16.58

View Gem
1 2 3
...
276
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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 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

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.

Posted By MMM in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

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