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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
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1.03ct Red Rhodolite Garnet, Oval, VS

1.03ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 22.57

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4.13ct Turquoise Grandidierite, Pear Shape, Translucent
Grandidierite Product Video (603135)

4.13ct Turquoise Grandidierite, Pear Shape, Translucent

12 x 8.6 mm

$ 226.24

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2.27ct Orange Hessonite Garnet, Oval, VS-SI

2.27ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.4 mm

$ 39.26

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8.14ct Multicolor Coral, Pear Shape, Translucent

8.14ct Multicolor Coral, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 25.76

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3.94ct Red Pyrope Garnet, Oval, VS

3.94ct Red Pyrope Garnet, Oval, VS

11.7 x 9.1 mm

$ 47.09

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4.37ctw Yellow Citrine, Pear Shape, VS

4.37ctw Yellow Citrine, Pear Shape, VS

8 x 5 mm (calibrated)

$ 23.95

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1.48ct Orange Hessonite Garnet, Emerald Cut, SI

1.48ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 5 mm (calibrated)

$ 29.18

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2.28ctw Blue Kyanite, Oval, VS-SI

2.28ctw Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 49.96

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0.55ct Pink Spinel, Cushion, VVS

0.55ct Pink Spinel, Cushion, VVS

4.9 x 4.5 mm

$ 38.35

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1.92ct Red Almandine Garnet, Baguette, VVS

1.92ct Red Almandine Garnet, Baguette, VVS

10 x 5 mm

$ 15.94

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1.66ct Orange Hessonite Garnet, Oval, VS

1.66ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 29.29

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1.94ct Pink Strawberry Quartz, Round, Translucent

1.94ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.88

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2.04ct Orange Hessonite Garnet, Cushion, VS

2.04ct Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 40.64

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21.65ct Multicolor Pietersite, Oval, Opaque

21.65ct Multicolor Pietersite, Oval, Opaque

25.9 x 15.8 mm

$ 71.88

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8.56ct Brown Tiger'S Eye, Cushion, Opaque

8.56ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.52

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1.85ct Brown Kornerupine, Oval, VS

1.85ct Brown Kornerupine, Oval, VS

8.7 x 6.3 mm

$ 153.55

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0.10ct Black Diamond, Round, Opaque

0.10ct Black Diamond, Round, Opaque

2.7 mm (calibrated)

$ 34.23

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8.71ct Multicolor Agate, Oval, Opaque

8.71ct Multicolor Agate, Oval, Opaque

12.2 x 11.4 mm

$ 14.75

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2.24ct Orange Hessonite Garnet, Oval, VS

2.24ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 38.75

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1.44ctw Yellow Citrine, Pear Shape, VVS-VS

1.44ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 11.47

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5.43ctw Purple Rhodolite Garnet, Trillion, VS

5.43ctw Purple Rhodolite Garnet, Trillion, VS

5.3 x 5.1 mm

$ 47.59

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2.32ct Red Almandine Garnet, Oval, VS

2.32ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 86.65

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4.49ct Violet Amethyst, Pear Shape, VVS-VS

4.49ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 34.43

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0.54ct Orange Spessartite Garnet, Oval, VS
Spessartite Garnet Product Video (685336)

0.54ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 18.82

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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