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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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10.67ctw Violet Amethyst, Oval, Transparent

10.67ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 42.20

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35.75ct Multicolor Jasper, Pear Shape, Opaque

35.75ct Multicolor Jasper, Pear Shape, Opaque

35.2 x 28.8 mm

$ 17.23

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4.69ctw Red Pyrope Garnet, Marquise, VVS-VS

4.69ctw Red Pyrope Garnet, Marquise, VVS-VS

9.8 x 4.9 mm

$ 41.10

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1.52ctw Yellow Citrine, Heart, VVS-VS

1.52ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.11

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12.62ct Brown Tiger'S Eye, Fancy, Opaque

12.62ct Brown Tiger'S Eye, Fancy, Opaque

16 x 15.1 mm

$ 13.83

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1.58ct Yellow Sphene, Oval, Transparent

1.58ct Yellow Sphene, Oval, Transparent

7.2 x 5.8 mm

$ 7.87

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4.90ctw Green Peridot, Oval, VS

4.90ctw Green Peridot, Oval, VS

7.7 x 5.9 mm

$ 53.68

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7.82ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439427)

7.82ct Blue Hemimorphite Druzy, Fancy, Opaque

14.6 x 10.6 mm

$ 128.52

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1.87ct Orange Zircon, Oval, VVS
Zircon Product Video (357223)

1.87ct Orange Zircon, Oval, VVS

8 x 6 mm (calibrated)

$ 42.69

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1.47ct Yellow Citrine, Oval, VVS

1.47ct Yellow Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 10.25

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1.39ctw Yellow Citrine, Trillion, VS

1.39ctw Yellow Citrine, Trillion, VS

6 x 6 mm (calibrated)

$ 8.77

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12.52ct Multicolor Opal, Pear Shape, Transparent
Opal Product Video (746945)

12.52ct Multicolor Opal, Pear Shape, Transparent

23.4 x 17 mm

$ 623.50

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6.40ct Yellow Citrine, Oval, VS

6.40ct Yellow Citrine, Oval, VS

14.7 x 11.2 mm

$ 38.78

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7.90ctw Green Prehnite, Fancy, Translucent

7.90ctw Green Prehnite, Fancy, Translucent

14.1 x 9.8 mm

$ 12.99

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1.96ctw Green Demantoid Garnet, Oval, VS

1.96ctw Green Demantoid Garnet, Oval, VS

4.8 x 3.9 mm

$ 214.74

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5.99ct Pink Rose Quartz, Emerald Cut, Transparent

5.99ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 32.82

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0.45ct Yellow Color-Change Diaspore, Oval, VVS

0.45ct Yellow Color-Change Diaspore, Oval, VVS

5 x 4.3 mm

$ 23.75

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2.95ctw Orange Sunstone, Oval, Translucent

2.95ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 16.90

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16.80ctw Pink Coral, Fancy, Opaque
Coral Product Video (333650)

16.80ctw Pink Coral, Fancy, Opaque

15.3 x 11.1 mm

$ 184.06

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2.20ctw Red Spessartite Garnet, Round, VS
Spessartite Garnet Product Video (436344)

2.20ctw Red Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 72.31

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2.89ct Orange Pyrope Garnet, Fancy, Translucent

2.89ct Orange Pyrope Garnet, Fancy, Translucent

14 x 9 mm (calibrated)

$ 7.25

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1.47ct Pink Tourmaline, Emerald Cut, VS

1.47ct Pink Tourmaline, Emerald Cut, VS

11.3 x 4.3 mm

$ 111.12

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7.64ct White Rainbow Moonstone, Pear Shape, Translucent

7.64ct White Rainbow Moonstone, Pear Shape, Translucent

19 x 9.7 mm

$ 53.27

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0.76ct Yellow Color-Change Diaspore, Oval, VS-SI

0.76ct Yellow Color-Change Diaspore, Oval, VS-SI

6 x 5 mm

$ 40.12

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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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
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Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 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
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