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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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1.23ct Red Rhodolite Garnet, Oval, VS-SI

1.23ct Red Rhodolite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 45.94

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1.69ct Orange Hessonite Garnet, Cushion, VS

1.69ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 28.42

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5.65ctw Multicolor Labradorite, Baguette, Translucent

5.65ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 7.77

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67.92ctw Multicolor Labradorite, Round, Translucent

67.92ctw Multicolor Labradorite, Round, Translucent

25.8 mm

$ 80.49

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2.32ct Orange Hessonite Garnet, Cushion, SI

2.32ct Orange Hessonite Garnet, Cushion, SI

8 x 8 mm (calibrated)

$ 50.84

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2.16ct Orange Hessonite Garnet, Cushion, VS-SI

2.16ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 35.01

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9.88ct Brown Tiger'S Eye, Oval, Opaque

9.88ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 9.84

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2.60ct Pink Strawberry Quartz, Oval, Transparent

2.60ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.32

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3.90ct Orange Sunstone, Oval, Translucent

3.90ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 23.21

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2.54ct Orange Hessonite Garnet, Oval, VS-SI

2.54ct Orange Hessonite Garnet, Oval, VS-SI

9.1 x 7.5 mm

$ 44.83

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0.91ct Green Sphene, Oval, Transparent

0.91ct Green Sphene, Oval, Transparent

6.2 x 5.1 mm

$ 4.53

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1.59ct Multicolor Opal, Oval, Transparent

1.59ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 69.68

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1.27ct Green Tourmaline, Emerald Cut, VS

1.27ct Green Tourmaline, Emerald Cut, VS

13.7 x 3.4 mm

$ 33.40

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1.62ct Orange Citrine, Oval, VVS

1.62ct Orange Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 16.14

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18.38ct Multicolor Jasper, Pear Shape, Opaque

18.38ct Multicolor Jasper, Pear Shape, Opaque

27 x 18.5 mm

$ 15.11

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3.90ctw Purple Rhodolite Garnet, Oval, VVS-VS

3.90ctw Purple Rhodolite Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 82.93

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38.60ct Multicolor Jasper, Oval, Opaque

38.60ct Multicolor Jasper, Oval, Opaque

33.1 x 25.7 mm

$ 42.29

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5.28ct Yellow Citrine, Round, VS

5.28ct Yellow Citrine, Round, VS

12 mm (calibrated)

$ 46.27

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2.27ct Purple Kunzite, Emerald Cut, VVS-VS

2.27ct Purple Kunzite, Emerald Cut, VVS-VS

7.8 x 5.4 mm

$ 62.47

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0.10ctw Black Diamond, Round, Opaque

0.10ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 29.05

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3.76ct Pink Strawberry Quartz, Oval, Transparent

3.76ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 28.20

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1.80ct Pink Strawberry Quartz, Round, Translucent

1.80ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.80

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33.27ct Multicolor Jasper, Oval, Opaque

33.27ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 18.88

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1.27ct Multicolor Opal, Oval, Transparent

1.27ct Multicolor Opal, Oval, Transparent

9.4 x 7.4 mm

$ 31.62

View Gem
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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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
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
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