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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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0.35ct Orange Spessartite Garnet, Oval, VS-SI

0.35ct Orange Spessartite Garnet, Oval, VS-SI

4.6 x 3.8 mm

$ 12.20

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1.48ct Yellow Beryl, Round, VVS

1.48ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 32.43

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2.63ctw Red Pyrope Garnet, Marquise, VVS-VS

2.63ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.2 mm

$ 23.05

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1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

6.4 x 6.1 mm

$ 92.63

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4.89ct Yellow Citrine, Emerald Cut, VVS-VS

4.89ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 34.10

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8.38ctw Green Prehnite, Fancy, Translucent

8.38ctw Green Prehnite, Fancy, Translucent

13.4 x 8.5 mm

$ 13.78

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3.75ctw Violet Amethyst, Oval, VVS-VS

3.75ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 20.55

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0.75ct Green Tourmaline, Baguette, VVS

0.75ct Green Tourmaline, Baguette, VVS

9.7 x 3 mm

$ 26.15

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23.45ct Pink Rose Quartz, Oval, Transparent/Translucent
Rose Quartz Product Video (344924)

23.45ct Pink Rose Quartz, Oval, Transparent/Translucent

18.9 x 15.4 mm

$ 34.69

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7.15ct Brown Smoky Quartz, Emerald Cut, VVS

7.15ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 11.69

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17.85ctw Green Amazonite, Marquise, Opaque

17.85ctw Green Amazonite, Marquise, Opaque

19.9 x 10.2 mm

$ 14.23

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2.24ctw Red Pyrope Garnet, Marquise, VVS-VS

2.24ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.2 mm

$ 19.63

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1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 22.31

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0.97ctw Orange Spessartite Garnet, Oval, VS

0.97ctw Orange Spessartite Garnet, Oval, VS

5.1 x 4.2 mm

$ 33.81

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0.83ct Orange Hessonite Garnet, Oval, VS

0.83ct Orange Hessonite Garnet, Oval, VS

6.5 x 5.2 mm

$ 14.48

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0.95ct Green Peridot, Emerald Cut, VS

0.95ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 14.19

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2.26ctw Orange Sunstone, Oval, Translucent

2.26ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 11.56

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1.73ct Pink Strawberry Quartz, Oval, Translucent

1.73ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.65

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1.57ct Green Tourmaline, Emerald Cut, VVS-VS

1.57ct Green Tourmaline, Emerald Cut, VVS-VS

15.1 x 4 mm

$ 43.01

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1.10ct Purple Tourmaline, Oval, Transparent

1.10ct Purple Tourmaline, Oval, Transparent

7.2 x 5.8 mm

$ 18.23

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1.54ctw Red Pyrope Garnet, Square, VS

1.54ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.81

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3.49ct Orange Sunstone, Oval, Transparent

3.49ct Orange Sunstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 21.00

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4.94ct Brown Smoky Quartz, Round, VVS-VS

4.94ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 27.06

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3.98ct Brown Smoky Quartz, Round, VVS-VS

3.98ct Brown Smoky Quartz, Round, VVS-VS

10.5 mm

$ 6.54

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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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

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

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

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 -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
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