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
45.46ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

45.46ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

38 x 19.8 mm

$ 74.71

View Gem
16.04ct Multicolor Amethyst Geode Slice, Fancy, Transparent

16.04ct Multicolor Amethyst Geode Slice, Fancy, Transparent

21.6 x 17.8 mm

$ 15.14

View Gem
3.77ct Pink Strawberry Quartz, Round, Translucent

3.77ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 22.72

View Gem
2.83ct Violet Amethyst, Trillion, VS

2.83ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 18.09

View Gem
0.88ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458544)

0.88ctw Green Demantoid Garnet, Oval, VS

4.8 x 4.1 mm

$ 132.17

View Gem
1.03ct Orange Hessonite Garnet, Round, VS

1.03ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 17.45

View Gem
3.43ctw Yellow Tourmaline, Oval, VS

3.43ctw Yellow Tourmaline, Oval, VS

7 x 5.5 mm

$ 136.52

View Gem
3.01ct Green Tourmaline, Emerald Cut, VS
Tourmaline Product Video (347663)

3.01ct Green Tourmaline, Emerald Cut, VS

22.4 x 4 mm

$ 148.40

View Gem
5.92ct Violet Amethyst, Oval, Transparent

5.92ct Violet Amethyst, Oval, Transparent

13.2 x 11.4 mm

$ 34.40

View Gem
1.56ct Orange Hessonite Garnet, Oval, VS

1.56ct Orange Hessonite Garnet, Oval, VS

7.8 x 6.3 mm

$ 31.08

View Gem
3.04ctw Multicolor Opal, Round, Transparent

3.04ctw Multicolor Opal, Round, Transparent

6.5 mm (calibrated)

$ 70.97

View Gem
4.08ctw Orange Hessonite Garnet, Square, VS-SI
Hessonite Garnet Product Video (392989)

4.08ctw Orange Hessonite Garnet, Square, VS-SI

7 x 7 mm (calibrated)

$ 89.40

View Gem
28.63ct Black Snowflake Obsidian, Pear Shape, Opaque
Snowflake Obsidian Product Video (618040)

28.63ct Black Snowflake Obsidian, Pear Shape, Opaque

31.3 x 21.9 mm

$ 18.82

View Gem
1.52ct Brown Color-Change Garnet, Cushion, VS

1.52ct Brown Color-Change Garnet, Cushion, VS

7.4 x 5.2 mm

$ 121.43

View Gem
22.72ct Violet Amethyst, Emerald Cut, VVS

22.72ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 158.41

View Gem
19.30ct Violet Amethyst, Emerald Cut, VVS

19.30ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 153.78

View Gem
39.86ct Multicolor Jasper, Fancy, Translucent

39.86ct Multicolor Jasper, Fancy, Translucent

47.3 x 25.6 mm

$ 31.44

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
3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 70.21

View Gem
1.41ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448532)

1.41ct Purple Sapphire, Cushion, VS

7.1 x 4.6 mm

$ 744.59

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
8.83ct Pink Strawberry Quartz, Oval, Translucent

8.83ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 53.02

View Gem
18.61ctw Brown Smoky Quartz, Fancy, VVS
Smoky Quartz Product Video (618079)

18.61ctw Brown Smoky Quartz, Fancy, VVS

15.9 x 13.9 mm

$ 78.09

View Gem
0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

5.5 x 4.2 mm

$ 27.98

View Gem
1 2 3
...
43
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

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 -> 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

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great

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