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Untreated Gemstones

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

Untreated Gemstones Weight
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0.57ct Orange Spessartite Garnet, Oval, VS-SI

0.57ct Orange Spessartite Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 19.87

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0.97ctw Orange Spessartite Garnet, Oval, VS

0.97ctw Orange Spessartite Garnet, Oval, VS

5.1 x 4.2 mm

$ 33.81

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16.68ct White Rose Quartz, Flower Cut, Transparent

16.68ct White Rose Quartz, Flower Cut, Transparent

19.8 x 19.8 mm

$ 36.55

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1.00ct Yellow Sphalerite, Oval, SI-I1

1.00ct Yellow Sphalerite, Oval, SI-I1

6.1 x 4.8 mm

$ 49.80

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1.91ct Orange Sunstone, Round, Translucent

1.91ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 11.42

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22.04ct Orange Spessartite Garnet, Flower Cut, Translucent

22.04ct Orange Spessartite Garnet, Flower Cut, Translucent

21.3 x 14.7 mm

$ 43.47

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14.47ct Multicolor Pietersite, Baguette, Opaque

14.47ct Multicolor Pietersite, Baguette, Opaque

25.4 x 10.1 mm

$ 48.04

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16.54ct White Rainbow Moonstone, Oval, Opaque

16.54ct White Rainbow Moonstone, Oval, Opaque

23.5 x 13.2 mm

$ 205.92

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6.83ct Multicolor Agate, Oval, Opaque

6.83ct Multicolor Agate, Oval, Opaque

12.4 x 11 mm

$ 6.81

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1.64ct Yellow Citrine, Square, VVS-VS

1.64ct Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 10.77

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5.82ctw Yellow Citrine, Heart, VS

5.82ctw Yellow Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 34.78

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3.14ct Yellow Citrine, Square, VS

3.14ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 20.63

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24.95ct Multicolor Jasper, Oval, Opaque

24.95ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 16.95

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35.65ct Brown Moonstone, Oval, Opaque

35.65ct Brown Moonstone, Oval, Opaque

22.2 x 16.1 mm

$ 58.58

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2.14ctw Orange Moonstone, Cushion, Opaque

2.14ctw Orange Moonstone, Cushion, Opaque

6 x 6 mm (calibrated)

$ 4.69

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1.72ctw Multicolor Opal, Oval, Transparent

1.72ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 68.52

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1.08ct Violet Amethyst, Square, VVS-VS

1.08ct Violet Amethyst, Square, VVS-VS

6.8 x 6.5 mm

$ 8.61

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2.80ctw Violet Amethyst, Heart, VVS-VS

2.80ctw Violet Amethyst, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 21.47

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3.49ctw Multicolor Andalusite, Round, VS

3.49ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 153.44

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1.26ct Orange Hessonite Garnet, Oval, VS-SI

1.26ct Orange Hessonite Garnet, Oval, VS-SI

7.3 x 6.1 mm

$ 24.85

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0.88ctw White Rainbow Moonstone, Oval, Transparent

0.88ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 28.93

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4.07ctw Red Pyrope Garnet, Marquise, VVS-VS

4.07ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 35.67

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46.45ct Multicolor Rhodonite, Oval, Opaque

46.45ct Multicolor Rhodonite, Oval, Opaque

28.5 x 20.5 mm

$ 26.83

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6.80ctw Pink Strawberry Quartz, Oval, Transparent

6.80ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 51.00

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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 found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate
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