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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
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Untreated Gemstones Treatment

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1.35ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.35ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 26.63

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4.24ct Violet Amethyst, Pear Shape, VVS

4.24ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 27.87

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6.35ct Pink Rose Quartz, Oval, Transparent

6.35ct Pink Rose Quartz, Oval, Transparent

14 x 11 mm

$ 34.79

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14.28ct Multicolor Boulder Opal, Cushion, Opaque
Boulder Opal Product Video (627636)

14.28ct Multicolor Boulder Opal, Cushion, Opaque

23.2 x 11.1 mm

$ 109.52

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0.95ct Pink Spinel, Cushion, VS

0.95ct Pink Spinel, Cushion, VS

5.9 x 5.5 mm

$ 70.97

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0.57ct Green Sphene, Oval, VS

0.57ct Green Sphene, Oval, VS

6.4 x 4.2 mm

$ 34.35

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3.84ct Red Strawberry Quartz, Oval, Translucent

3.84ct Red Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 45.90

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1.82ctw Orange Moonstone, Cushion, Opaque

1.82ctw Orange Moonstone, Cushion, Opaque

6 x 6 mm (calibrated)

$ 3.63

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0.36ct Green Peridot, Marquise, VVS-VS
Peridot Product Video (503241)

0.36ct Green Peridot, Marquise, VVS-VS

6.9 x 3.5 mm

$ 2.64

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1.61ctw Red Pyrope Garnet, Square, VS

1.61ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.35

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0.52ct Green Peridot, Emerald Cut, VVS

0.52ct Green Peridot, Emerald Cut, VVS

5.6 x 3.9 mm

$ 7.77

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7.28ct Multicolor Pietersite, Pear Shape, Opaque

7.28ct Multicolor Pietersite, Pear Shape, Opaque

18.9 x 10.1 mm

$ 14.87

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1.46ct Pink Tourmaline, Oval, VS-SI

1.46ct Pink Tourmaline, Oval, VS-SI

7.6 x 6.3 mm

$ 218.12

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3.31ct Green Prehnite, Pear Shape, Transparent

3.31ct Green Prehnite, Pear Shape, Transparent

10.3 x 7.3 mm

$ 14.99

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75.33ct White Howlite, Pear Shape, Opaque

75.33ct White Howlite, Pear Shape, Opaque

45.1 x 30.6 mm

$ 34.40

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1.47ct Orange Hessonite Garnet, Square, VS

1.47ct Orange Hessonite Garnet, Square, VS

6 x 6 mm (calibrated)

$ 25.66

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4.10ct Yellow Citrine, Fancy, VVS

4.10ct Yellow Citrine, Fancy, VVS

12.3 x 9.5 mm

$ 26.95

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0.55ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

0.55ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

4.7 x 4.5 mm

$ 16.43

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4.84ct Yellow Citrine, Emerald Cut, VVS-VS

4.84ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 10 mm (calibrated)

$ 37.12

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1.34ct Yellow Citrine, Emerald Cut, VVS-VS

1.34ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.35

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1.53ct Green Tourmaline, Emerald Cut, VS

1.53ct Green Tourmaline, Emerald Cut, VS

19.5 x 3.2 mm

$ 40.23

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1.21ct White Rainbow Moonstone, Oval, Transparent

1.21ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 38.56

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2.35ct Red Fire Opal, Oval, Transparent

2.35ct Red Fire Opal, Oval, Transparent

10.9 x 8.4 mm

$ 75.68

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1.39ct White Rainbow Moonstone, Round, Transparent

1.39ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 23.66

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

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
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