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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

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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33.58ct Multicolor Jasper, Oval, Opaque

33.58ct Multicolor Jasper, Oval, Opaque

32.1 x 19.7 mm

$ 16.19

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1.60ctw Orange Zircon, Oval, VVS-VS

1.60ctw Orange Zircon, Oval, VVS-VS

6.2 x 4.2 mm

$ 39.84

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15.89ct Yellow Calcite, Pear Shape, Translucent

15.89ct Yellow Calcite, Pear Shape, Translucent

26.3 x 15.4 mm

$ 10.91

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42.76ct Gray Hematite, Cushion, Opaque

42.76ct Gray Hematite, Cushion, Opaque

24.6 x 21.6 mm

$ 41.70

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3.34ct Yellow Citrine, Oval, VVS-VS

3.34ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 26.61

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2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 20.60

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13.60ctw Multicolor Jasper, Fancy, Opaque

13.60ctw Multicolor Jasper, Fancy, Opaque

21.3 x 12.5 mm

$ 7.72

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0.97ct Yellow Citrine, Trillion, VVS-VS

0.97ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 6.37

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3.84ct Orange Spessartite Garnet, Oval, Translucent

3.84ct Orange Spessartite Garnet, Oval, Translucent

10 x 8 mm (calibrated)

$ 95.62

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2.84ctw Red Pyrope Garnet, Heart, VVS-VS

2.84ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 21.78

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18.61ct Multicolor Pietersite, Cushion, Opaque

18.61ct Multicolor Pietersite, Cushion, Opaque

26 x 13.9 mm

$ 61.79

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5.68ct Violet Amethyst, Cushion, VVS

5.68ct Violet Amethyst, Cushion, VVS

13 x 11 mm (calibrated)

$ 39.60

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0.75ct Yellow Beryl, Trillion, VVS

0.75ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 14.94

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21.55ct Pink Coral, Fancy, Opaque
Coral Product Video (333715)

21.55ct Pink Coral, Fancy, Opaque

24.7 x 15.4 mm

$ 306.93

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1.61ct Purple Rhodolite Garnet, Oval, VVS

1.61ct Purple Rhodolite Garnet, Oval, VVS

8 x 5.6 mm

$ 56.12

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5.95ct Brown Smoky Quartz, Pear Shape, VS

5.95ct Brown Smoky Quartz, Pear Shape, VS

15.1 x 11 mm

$ 11.85

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0.66ct Yellow Citrine, Heart, VVS

0.66ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.26

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1.14ct Blue Cavansite, Fancy, Opaque

1.14ct Blue Cavansite, Fancy, Opaque

8.1 x 6.9 mm

$ 6.62

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3.49ctw Pink Strawberry Quartz, Oval, Translucent

3.49ctw Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 20.96

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25.75ctw Multicolor Fossil Coral, Cushion, Opaque
Fossil Coral Product Video (514177)

25.75ctw Multicolor Fossil Coral, Cushion, Opaque

19.7 x 11.8 mm

$ 55.87

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3.74ctw Violet Amethyst, Square, VVS-VS
Amethyst Product Video (457950)

3.74ctw Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 28.68

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6.09ct Multicolor Rainbow Pyrite, Heart, Opaque

6.09ct Multicolor Rainbow Pyrite, Heart, Opaque

14.7 x 14.4 mm

$ 15.77

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1.82ct Pink Strawberry Quartz, Oval, Translucent

1.82ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.10

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8.08ct Green Prehnite, Fancy, Translucent

8.08ct Green Prehnite, Fancy, Translucent

16 x 11.1 mm

$ 13.28

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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 -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
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

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
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