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
19.54ct Multicolor Jasper, Oval, Opaque

19.54ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 32.11

View Gem
5.38ct Yellow Citrine, Oval, VVS-VS

5.38ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.30

View Gem
6.39ct Yellow Moonstone, Oval, Translucent

6.39ct Yellow Moonstone, Oval, Translucent

13.3 x 10.3 mm

$ 13.79

View Gem
4.80ctw Yellow Citrine, Fancy, VVS-VS

4.80ctw Yellow Citrine, Fancy, VVS-VS

14.1 x 7 mm

$ 26.29

View Gem
1.90ct Yellow Citrine, Round, VS

1.90ct Yellow Citrine, Round, VS

8 mm (calibrated)

$ 12.62

View Gem
4.40ct Pink Strawberry Quartz, Round, Translucent

4.40ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 26.90

View Gem
25.94ctw Multicolor Jasper, Sphere / Ball, Opaque

25.94ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 28.42

View Gem
2.11ctw Yellow Citrine, Square, VVS-VS

2.11ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 12.76

View Gem
0.88ctw Green Peridot, Oval, Transparent

0.88ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 15.78

View Gem
1.89ctw Yellow Zircon, Oval, VVS-VS

1.89ctw Yellow Zircon, Oval, VVS-VS

6 x 5 mm

$ 47.06

View Gem
2.84ct Yellow Citrine, Oval, Transparent

2.84ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 11.16

View Gem
7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.3 x 9.8 mm

$ 21.36

View Gem
1.42ct Orange Hessonite Garnet, Square, SI

1.42ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 23.89

View Gem
4.72ctw Red Almandine Garnet, Oval, VS

4.72ctw Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 176.29

View Gem
7.86ctw Violet Amethyst, Oval, Transparent

7.86ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 31.08

View Gem
0.99ct Purple Spinel, Cushion, VS

0.99ct Purple Spinel, Cushion, VS

6.7 x 5.5 mm

$ 98.60

View Gem
0.73ct Yellow Citrine, Heart, VVS-VS

0.73ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.82

View Gem
15.09ct Multicolor Boulder Opal, Oval, Opaque

15.09ct Multicolor Boulder Opal, Oval, Opaque

18.5 x 14.6 mm

$ 105.21

View Gem
0.73ct Yellow Citrine, Pear Shape, VVS-VS

0.73ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 3.64

View Gem
0.55ct Purple Spinel, Cushion, VVS-VS

0.55ct Purple Spinel, Cushion, VVS-VS

5.4 x 4.3 mm

$ 38.35

View Gem
0.46ct Orange Citrine, Marquise, VS

0.46ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.20

View Gem
0.21ct Green Kornerupine, Round, SI

0.21ct Green Kornerupine, Round, SI

3.7 mm

$ 79.32

View Gem
33.91ct Multicolor Amethyst Geode Slice, Fancy, Transparent

33.91ct Multicolor Amethyst Geode Slice, Fancy, Transparent

30 x 22 mm (calibrated)

$ 36.14

View Gem
6.64ctw Green Prehnite, Oval, Transparent

6.64ctw Green Prehnite, Oval, Transparent

7.3 x 6.3 mm

$ 36.37

View Gem
1 2 3
...
256
Choose Page
1 - 1857

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 website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
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 -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

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