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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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25.71ct Multicolor Jasper, Oval, Opaque

25.71ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 20.28

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2.29ct Green Tourmaline, Emerald Cut, VVS

2.29ct Green Tourmaline, Emerald Cut, VVS

20.7 x 3.6 mm

$ 62.73

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0.18ctw White Diamond, Round, VVS-VS

0.18ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 321.79

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0.60ct Red Pyrope Garnet, Heart, VS

0.60ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 14.94

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4.58ctw Green Prehnite, Oval, Transparent

4.58ctw Green Prehnite, Oval, Transparent

8.6 x 8 mm

$ 25.09

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1.34ct Brown Color-Change Garnet, Oval, VS

1.34ct Brown Color-Change Garnet, Oval, VS

7.3 x 5.3 mm

$ 107.05

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3.43ct Pink Kunzite, Emerald Cut, VS

3.43ct Pink Kunzite, Emerald Cut, VS

8.7 x 6.6 mm

$ 85.41

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2.63ctw Violet Amethyst, Trillion, VS

2.63ctw Violet Amethyst, Trillion, VS

6.8 x 6.1 mm

$ 17.29

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6.34ct White Dendritic Agate, Pear Shape, Opaque

6.34ct White Dendritic Agate, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 5.05

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15.03ct Brown Smoky Quartz, Emerald Cut, VVS

15.03ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 28.00

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1.76ct Yellow Citrine, Flower Cut, Transparent

1.76ct Yellow Citrine, Flower Cut, Transparent

7.5 x 7.4 mm

$ 13.50

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2.16ct Orange Zircon, Round, VVS

2.16ct Orange Zircon, Round, VVS

7 mm (calibrated)

$ 66.27

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0.77ct Yellow Citrine, Oval, Transparent

0.77ct Yellow Citrine, Oval, Transparent

10.1 x 4.1 mm

$ 5.37

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1.84ct Pink Tourmaline, Oval, VS
Tourmaline Product Video (742822)

1.84ct Pink Tourmaline, Oval, VS

7.9 x 7.2 mm

$ 229.08

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0.72ct Green Tourmaline, Emerald Cut, VS

0.72ct Green Tourmaline, Emerald Cut, VS

8.8 x 3.6 mm

$ 17.93

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1.51ct Pink Strawberry Quartz, Oval, Translucent

1.51ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 11.59

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0.87ct Yellow Citrine, Marquise, VS

0.87ct Yellow Citrine, Marquise, VS

9.1 x 4.9 mm

$ 6.93

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17.37ctw Green Aventurine, Oval, Translucent

17.37ctw Green Aventurine, Oval, Translucent

20 x 14 mm

$ 40.16

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1.66ct Orange Hessonite Garnet, Oval, VS-SI

1.66ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 6.5 mm

$ 29.29

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2.16ctw Red Pyrope Garnet, Marquise, VVS-VS

2.16ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 18.93

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6.76ct Violet Amethyst, Heart, Transparent

6.76ct Violet Amethyst, Heart, Transparent

13 x 11 mm (calibrated)

$ 33.66

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7.96ct Multicolor Agate, Fancy, Translucent

7.96ct Multicolor Agate, Fancy, Translucent

14.1 x 7.5 mm

$ 13.94

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5.15ct Brown Tiger'S Eye, Oval, Opaque

5.15ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.03

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2.54ctw Violet Amethyst, Oval, VVS-VS

2.54ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.91

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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

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel 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 -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate
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