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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
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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10.02ctw Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (634184)

10.02ctw Multicolor Pietersite, Oval, Opaque

17.5 x 10.6 mm

$ 37.83

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0.46ct White Rainbow Moonstone, Baguette, Transparent

0.46ct White Rainbow Moonstone, Baguette, Transparent

6.3 x 4 mm

$ 16.04

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2.04ct Pink Tourmaline, Oval, VVS-VS

2.04ct Pink Tourmaline, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 237.05

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14.36ct Multicolor Fire Agate, Fancy, Opaque

14.36ct Multicolor Fire Agate, Fancy, Opaque

18.7 x 15.7 mm

$ 86.54

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0.38ct Yellow Citrine, Heart, VVS

0.38ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.03

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2.45ctw Yellow Beryl, Oval, VVS-VS

2.45ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 61.01

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3.38ct Pink Strawberry Quartz, Oval, Transparent

3.38ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.35

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6.54ctw Multicolor Labradorite, Marquise, Translucent

6.54ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 14.46

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43.90ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

43.90ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.5 mm

$ 96.20

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23.45ct Pink Rose Quartz, Oval, Transparent/Translucent
Rose Quartz Product Video (344924)

23.45ct Pink Rose Quartz, Oval, Transparent/Translucent

18.9 x 15.4 mm

$ 34.69

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10.13ctw Multicolor Labradorite, Round, Translucent

10.13ctw Multicolor Labradorite, Round, Translucent

10 mm (calibrated)

$ 24.62

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1.20ctw Yellow Citrine, Pear Shape, VVS-VS

1.20ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 7.43

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4.09ct Yellow Citrine, Oval, VS

4.09ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 22.41

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1.18ct Red Rhodolite Garnet, Oval, VS

1.18ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 31.34

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0.60ct Violet Amethyst, Emerald Cut, VS

0.60ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.49

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1.03ct Orange Hessonite Garnet, Square, SI

1.03ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 17.28

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1.96ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.96ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 32.73

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44.32ct Violet Charoite, Fancy, Opaque
Charoite Product Video (566951)

44.32ct Violet Charoite, Fancy, Opaque

38.5 x 21.9 mm

$ 83.03

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0.71ct Green Tourmaline, Baguette, VVS

0.71ct Green Tourmaline, Baguette, VVS

13.7 x 2.5 mm

$ 24.75

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1.32ct Yellow Color-Change Diaspore, Pear Shape, SI

1.32ct Yellow Color-Change Diaspore, Pear Shape, SI

8.6 x 5.7 mm

$ 70.33

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63.83ct Violet Charoite, Oval, Opaque

63.83ct Violet Charoite, Oval, Opaque

41.6 x 27.6 mm

$ 104.89

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18.18ct Multicolor Dendritic Agate, Cushion, Translucent

18.18ct Multicolor Dendritic Agate, Cushion, Translucent

19 x 19 mm (calibrated)

$ 36.21

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21.46ct Multicolor Bloodstone, Oval, Opaque

21.46ct Multicolor Bloodstone, Oval, Opaque

17.7 x 12 mm

$ 42.75

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1.82ct Orange Hessonite Garnet, Cushion, VVS-VS

1.82ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 36.25

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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

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 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

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate
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