X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
1.34ct Purple Sapphire, Cushion, VS
Sapphire Product Video (558376)

1.34ct Purple Sapphire, Cushion, VS

7.1 x 5.3 mm

$ 588.89

View Gem
15.37ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450370)

15.37ct Blue Aquamarine, Emerald Cut, VVS

23.7 x 9.2 mm

$ 2,551.42

View Gem
0.51ctw White Diamond, Heart, VVS
Diamond Product Video (685659)

0.51ctw White Diamond, Heart, VVS

3.3 x 2.9 mm

$ 2,077.86

View Gem
15.82ctw Black Spinel, Round, Opaque

15.82ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 52.00

View Gem
0.17ct Yellow Diamond, Round, VS-SI
Diamond Product Video (543911)

0.17ct Yellow Diamond, Round, VS-SI

3.5 mm (calibrated)

$ 306.68

View Gem
1.53ct Purple Spinel, Cushion, VS

1.53ct Purple Spinel, Cushion, VS

6.7 x 5.3 mm

$ 117.34

View Gem
12.36ct Pink Morganite, Trillion, Translucent
Morganite Product Video (594889)

12.36ct Pink Morganite, Trillion, Translucent

15 x 15 mm (calibrated)

$ 112.85

View Gem
10.51ctw Pink Morganite, Oval, Transparent

10.51ctw Pink Morganite, Oval, Transparent

12 x 10 mm (calibrated)

$ 115.15

View Gem
1.42ct Violet Sapphire, Pear Shape, VS
Sapphire Product Video (447676)

1.42ct Violet Sapphire, Pear Shape, VS

8.8 x 6.3 mm

$ 748.84

View Gem
1.13ct Purple Spinel, Cushion, VS

1.13ct Purple Spinel, Cushion, VS

6.5 x 5.5 mm

$ 67.01

View Gem
6.01ct Blue Aquamarine, Emerald Cut, VS
Aquamarine Product Video (412445)

6.01ct Blue Aquamarine, Emerald Cut, VS

12.6 x 8.2 mm

$ 954.76

View Gem
2.36ct Red Ruby, Pear Shape, VS-SI
Ruby Product Video (569414)

2.36ct Red Ruby, Pear Shape, VS-SI

10.9 x 6.7 mm

$ 11,133.44

View Gem
40.56ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (264265)

40.56ct Blue Aquamarine, Emerald Cut, VVS

22 x 17.5 mm

$ 10,785.85

View Gem
0.23ct Yellow Diamond, Round, VS
Diamond Product Video (564615)

0.23ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 419.90

View Gem
1.73ct Pink Morganite, Round, VVS-VS

1.73ct Pink Morganite, Round, VVS-VS

7.5 mm (calibrated)

$ 132.68

View Gem
1.53ct Pink Morganite, Pear Shape, VS
Morganite Product Video (517844)

1.53ct Pink Morganite, Pear Shape, VS

9.8 x 6.3 mm

$ 117.34

View Gem
1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366561)

1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS

8.2 x 5.6 mm

$ 131.69

View Gem
11.21ct Pink Morganite, Oval, Translucent

11.21ct Pink Morganite, Oval, Translucent

17.5 x 12.1 mm

$ 122.82

View Gem
0.14ct Black Diamond, Round, Opaque
Diamond Product Video (699335)

0.14ct Black Diamond, Round, Opaque

3 mm (calibrated)

$ 51.36

View Gem
1.14ct Pink Morganite, Pear Shape, VVS-VS
Morganite Product Video (478160)

1.14ct Pink Morganite, Pear Shape, VVS-VS

9.9 x 6.2 mm

$ 104.08

View Gem
1.15ct Yellow Chrysoberyl, Pear Shape, VVS

1.15ct Yellow Chrysoberyl, Pear Shape, VVS

8.6 x 5.7 mm

$ 134.02

View Gem
1.29ct Yellow Chrysoberyl, Pear Shape, VS
Chrysoberyl Product Video (366654)

1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

View Gem
0.14ctw Black Diamond, Square, Opaque

0.14ctw Black Diamond, Square, Opaque

2.2 x 2.2 mm

$ 69.72

View Gem
1.43ct Violet Spinel, Oval, VS-SI
Spinel Product Video (349311)

1.43ct Violet Spinel, Oval, VS-SI

7.5 x 5.6 mm

$ 237.38

View Gem
1 2 3
Choose Page
1 - 188

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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
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

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

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