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 › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
1.66ct Yellow Citrine, Pear Shape, VVS-VS

1.66ct Yellow Citrine, Pear Shape, VVS-VS

10.4 x 6.3 mm

$ 12.73

View Gem
2.88ct Yellow Rutile Quartz, Oval, Transparent

2.88ct Yellow Rutile Quartz, Oval, Transparent

11.1 x 7.2 mm

$ 7.76

View Gem
6.73ctw Pink Strawberry Quartz, Oval, Transparent

6.73ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 52.57

View Gem
0.24ct Violet Iolite, Marquise, VVS-VS

0.24ct Violet Iolite, Marquise, VVS-VS

6 x 3 mm (calibrated)

$ 9.56

View Gem
32.67ctw Multicolor Rhodochrosite, Cushion, Translucent

32.67ctw Multicolor Rhodochrosite, Cushion, Translucent

19.8 x 11.9 mm

$ 28.97

View Gem
3.37ctw Orange Moonstone, Oval, Translucent

3.37ctw Orange Moonstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.74

View Gem
7.33ct Green Prehnite, Pear Shape, Transparent
Prehnite Product Video (714885)

7.33ct Green Prehnite, Pear Shape, Transparent

18.1 x 9.5 mm

$ 182.52

View Gem
1.76ctw Violet Amethyst, Heart, Transparent

1.76ctw Violet Amethyst, Heart, Transparent

6 x 6 mm (calibrated)

$ 13.50

View Gem
1.30ct Orange Hessonite Garnet, Oval, VVS-VS

1.30ct Orange Hessonite Garnet, Oval, VVS-VS

7.5 x 6.1 mm

$ 19.86

View Gem
1.02ct Orange Zircon, Oval, VVS-VS

1.02ct Orange Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 25.40

View Gem
30.87ct Red Strawberry Quartz, Fancy, Opaque

30.87ct Red Strawberry Quartz, Fancy, Opaque

34 x 11 mm

$ 3.08

View Gem
18.62ctw Multicolor Pietersite, Oval, Opaque

18.62ctw Multicolor Pietersite, Oval, Opaque

18 x 13 mm (calibrated)

$ 81.61

View Gem
1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

9.7 x 4.5 mm

$ 108.46

View Gem
40.26ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

40.26ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

35.2 x 19.4 mm

$ 40.10

View Gem
12.15ct White Rainbow Moonstone, Oval, Transparent

12.15ct White Rainbow Moonstone, Oval, Transparent

18 x 13 mm (calibrated)

$ 181.52

View Gem
26.28ctw Multicolor Fossil Coral, Oval, Opaque

26.28ctw Multicolor Fossil Coral, Oval, Opaque

20.8 x 12.6 mm

$ 28.79

View Gem
7.89ct Pink Kunzite, Pear Shape, VS-SI
Kunzite Product Video (405844)

7.89ct Pink Kunzite, Pear Shape, VS-SI

17 x 10.1 mm

$ 216.12

View Gem
1.71ct Yellow Zircon, Round, VVS-VS

1.71ct Yellow Zircon, Round, VVS-VS

7 mm (calibrated)

$ 31.22

View Gem
4.73ct Yellow Citrine, Oval, VVS-VS

4.73ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 36.27

View Gem
4.07ct Multicolor Labradorite, Pear Shape, Translucent

4.07ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 9.01

View Gem
0.31ct Pink Morganite, Oval, VS

0.31ct Pink Morganite, Oval, VS

5.4 x 3.8 mm

$ 12.87

View Gem
1.95ct Yellow Citrine, Oval, Transparent

1.95ct Yellow Citrine, Oval, Transparent

8 x 6 mm (calibrated)

$ 10.68

View Gem
1.96ct Green Tourmaline, Emerald Cut, VS

1.96ct Green Tourmaline, Emerald Cut, VS

17.8 x 3.7 mm

$ 47.24

View Gem
3.19ct Yellow Rutile Topaz, Pear Shape, Transparent

3.19ct Yellow Rutile Topaz, Pear Shape, Transparent

12.4 x 7.3 mm

$ 66.19

View Gem
1 2 3
...
1423
Choose Page
1 - 1896

Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
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

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image