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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
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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2.43ct Orange Moonstone, Cushion, Translucent

2.43ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.84

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3.20ct Pink Strawberry Quartz, Oval, Transparent

3.20ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 24.00

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5.66ct Pink Rose Quartz, Round, Transparent

5.66ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 22.52

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1.70ct Yellow Color-Change Diaspore, Cushion, VS

1.70ct Yellow Color-Change Diaspore, Cushion, VS

9.5 x 4.8 mm

$ 69.36

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2.83ct Orange Hessonite Garnet, Oval, VS-SI

2.83ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 782 mm

$ 45.41

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5.57ct Multicolor Labradorite, Round, Translucent

5.57ct Multicolor Labradorite, Round, Translucent

11 mm (calibrated)

$ 13.54

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1.13ctw Orange Citrine, Oval, VS

1.13ctw Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 11.25

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1.69ctw Yellow Citrine, Trillion, VS

1.69ctw Yellow Citrine, Trillion, VS

6.3 x 6.2 mm

$ 11.79

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8.28ct Multicolor Pietersite, Pear Shape, Opaque

8.28ct Multicolor Pietersite, Pear Shape, Opaque

20.8 x 12.8 mm

$ 32.11

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1.35ct Purple Sapphire, Cushion, VS
Sapphire Product Video (447819)

1.35ct Purple Sapphire, Cushion, VS

7.5 x 5.6 mm

$ 711.93

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23.25ct Violet Amethyst, Round, VVS

23.25ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 185.26

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2.74ct Violet Amethyst, Trillion, VS

2.74ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.02

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4.42ctw Multicolor Labradorite, Square, Transparent

4.42ctw Multicolor Labradorite, Square, Transparent

7.3 x 7.1 mm

$ 6.64

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2.94ct Pink Strawberry Quartz, Oval, Translucent

2.94ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 22.55

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0.61ct Green Peridot, Marquise, VVS-VS

0.61ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 9.11

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2.43ct Turquoise Grandidierite, Round, Translucent
Grandidierite Product Video (603165)

2.43ct Turquoise Grandidierite, Round, Translucent

8 mm (calibrated)

$ 453.58

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5.63ct Pink Rose Quartz, Square, Transparent

5.63ct Pink Rose Quartz, Square, Transparent

10.5 x 10.5 mm

$ 30.84

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0.69ct Yellow Citrine, Heart, VVS-VS

0.69ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 4.81

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2.13ct Green Tourmaline, Emerald Cut, VVS-VS

2.13ct Green Tourmaline, Emerald Cut, VVS-VS

18.6 x 3.8 mm

$ 81.68

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1.74ct Yellow Beryl, Oval, VVS-VS

1.74ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 34.66

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1.14ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.14ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.6 x 5.2 mm

$ 3.59

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37.66ct Green Idocrase, Oval, Opaque

37.66ct Green Idocrase, Oval, Opaque

32.5 x 20.1 mm

$ 18.76

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7.69ct Blue Larimar, Pear Shape, Opaque

7.69ct Blue Larimar, Pear Shape, Opaque

16.9 x 11.8 mm

$ 88.46

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3.76ctw Orange Hessonite Garnet, Emerald Cut, VS

3.76ctw Orange Hessonite Garnet, Emerald Cut, VS

6.6 x 4.8 mm

$ 82.39

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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 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 -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate
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