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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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2.94ct Yellow Citrine, Square, VVS-VS

2.94ct Yellow Citrine, Square, VVS-VS

9 x 9 mm (calibrated)

$ 22.55

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0.07ct White Diamond, Marquise, VVS

0.07ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 243.29

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5.25ct Multicolor Fire Agate, Fancy, Translucent

5.25ct Multicolor Fire Agate, Fancy, Translucent

18.3 x 8.8 mm

$ 45.67

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18.71ct Multicolor Jasper, Fancy, Opaque

18.71ct Multicolor Jasper, Fancy, Opaque

37 x 15 mm

$ 24.60

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4.11ct Violet Amethyst, Oval, Transparent
Amethyst Product Video (636240)

4.11ct Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 28.65

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0.72ct Pink Tourmaline, Round, Transparent

0.72ct Pink Tourmaline, Round, Transparent

5.3 mm

$ 28.68

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2.98ctw Orange Zircon, Emerald Cut, VVS-VS

2.98ctw Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 48.97

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0.91ct Orange Hessonite Garnet, Square, VS

0.91ct Orange Hessonite Garnet, Square, VS

5.5 x 5.4 mm

$ 15.26

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7.63ctw Multicolor Pietersite, Pear Shape, Opaque

7.63ctw Multicolor Pietersite, Pear Shape, Opaque

18.8 x 9.3 mm

$ 17.86

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0.91ct Yellow Beryl, Cushion, VS

0.91ct Yellow Beryl, Cushion, VS

6 x 6 mm (calibrated)

$ 19.94

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1.00ct Orange Hessonite Garnet, Oval, VS-SI

1.00ct Orange Hessonite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 17.93

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2.56ct Green Tourmaline, Emerald Cut, SI

2.56ct Green Tourmaline, Emerald Cut, SI

20 x 4.3 mm

$ 70.12

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2.68ctw Orange Moonstone, Cushion, Translucent

2.68ctw Orange Moonstone, Cushion, Translucent

8 x 6 mm (calibrated)

$ 5.88

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4.80ct Multicolor Fire Agate, Fancy, Opaque

4.80ct Multicolor Fire Agate, Fancy, Opaque

12.1 x 9.3 mm

$ 36.91

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1.00ct Yellow Zircon, Oval, VS

1.00ct Yellow Zircon, Oval, VS

5.8 x 4.9 mm

$ 24.90

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4.97ct Brown Smoky Quartz, Oval, VVS-VS

4.97ct Brown Smoky Quartz, Oval, VVS-VS

11.1 x 10.2 mm

$ 14.64

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38.72ct Bi-Color Tourmaline, Fancy, Transparent
Tourmaline Product Video (521271)

38.72ct Bi-Color Tourmaline, Fancy, Transparent

29.7 x 27.3 mm

$ 321.38

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1.04ct Yellow Citrine, Cushion, VVS

1.04ct Yellow Citrine, Cushion, VVS

8 x 6 mm (calibrated)

$ 7.77

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0.80ctw Green Demantoid Garnet, Round, VS

0.80ctw Green Demantoid Garnet, Round, VS

3.2 mm

$ 127.55

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7.48ct Multicolor Boulder Opal, Oval, Opaque

7.48ct Multicolor Boulder Opal, Oval, Opaque

19.1 x 10.9 mm

$ 37.25

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11.27ct Red Star Garnet, Oval, Opaque

11.27ct Red Star Garnet, Oval, Opaque

15.1 x 10.6 mm

$ 11.67

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0.69ct Pink Morganite, Pear Shape, VVS-VS

0.69ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 4.5 mm

$ 60.47

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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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0.57ct Orange Sphalerite, Round, SI-I1

0.57ct Orange Sphalerite, Round, SI-I1

5 mm (calibrated)

$ 28.39

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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

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate
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