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
1.22ct Red Rhodolite Garnet, Emerald Cut, VS

1.22ct Red Rhodolite Garnet, Emerald Cut, VS

7.1 x 4.6 mm

$ 54.90

View Gem
1.26ct Orange Hessonite Garnet, Cushion, VS-SI

1.26ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 19.71

View Gem
0.76ct Green Peridot, Oval, VVS-VS

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.30

View Gem
5.67ct Brown Smoky Quartz, Round, VVS

5.67ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 11.12

View Gem
2.91ct Violet Amethyst, Trillion, VVS-VS

2.91ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.29

View Gem
4.96ct Pink Morganite, Trillion, Transparent

4.96ct Pink Morganite, Trillion, Transparent

12 x 12 mm (calibrated)

$ 54.34

View Gem
0.98ct Yellow Tourmaline, Oval, VVS-VS

0.98ct Yellow Tourmaline, Oval, VVS-VS

7.5 x 5.8 mm

$ 37.58

View Gem
25.51ctw Black Spinel, Baguette, Opaque
Spinel Product Video (372537)

25.51ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 200.68

View Gem
3.43ctw Yellow Citrine, Heart, VVS-VS

3.43ctw Yellow Citrine, Heart, VVS-VS

8 x 8 mm (calibrated)

$ 23.91

View Gem
9.30ct Pink Strawberry Quartz, Oval, Translucent

9.30ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 55.83

View Gem
5.31ct Multicolor Coral, Pear Shape, Translucent

5.31ct Multicolor Coral, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 17.45

View Gem
26.32ct Gray Hematite, Square, Opaque

26.32ct Gray Hematite, Square, Opaque

16.7 x 16.3 mm

$ 26.53

View Gem
0.21ct Pink Morganite, Round, VS-SI

0.21ct Pink Morganite, Round, VS-SI

4.2 mm

$ 8.72

View Gem
1.18ct Yellow Sphene, Oval, Transparent

1.18ct Yellow Sphene, Oval, Transparent

6.3 x 5.8 mm

$ 5.88

View Gem
12.15ct Black Nuummite, Oval, Opaque

12.15ct Black Nuummite, Oval, Opaque

17.6 x 13.8 mm

$ 53.60

View Gem
2.27ctw Purple Rhodolite Garnet, Round, VS

2.27ctw Purple Rhodolite Garnet, Round, VS

5 mm (calibrated)

$ 49.74

View Gem
3.88ctw Red Pyrope Garnet, Square, VS

3.88ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 29.76

View Gem
4.13ct Multicolor Labradorite, Pear Shape, Translucent

4.13ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.13

View Gem
0.95ct Yellow Beryl, Oval, VS

0.95ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 18.14

View Gem
12.76ct Multicolor Agate, Fancy, Translucent

12.76ct Multicolor Agate, Fancy, Translucent

17.1 x 8.9 mm

$ 22.34

View Gem
30.49ct White Howlite, Oval, Opaque

30.49ct White Howlite, Oval, Opaque

30 x 22 mm (calibrated)

$ 15.19

View Gem
0.96ct Blue Kyanite, Oval, VS-SI

0.96ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 21.03

View Gem
14.75ctw Black Spinel, Cushion, Opaque

14.75ctw Black Spinel, Cushion, Opaque

12 x 10 mm (calibrated)

$ 80.81

View Gem
1.84ct Pink Tourmaline, Emerald Cut, VVS

1.84ct Pink Tourmaline, Emerald Cut, VVS

12.2 x 4.3 mm

$ 139.10

View Gem
1 2 3
...
195
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 -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image