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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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1.42ct Orange Hessonite Garnet, Square, SI

1.42ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 23.89

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1.75ct White Rainbow Moonstone, Oval, Transparent

1.75ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 57.54

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2.12ct Orange Hessonite Garnet, Emerald Cut, VS

2.12ct Orange Hessonite Garnet, Emerald Cut, VS

7.7 x 6.1 mm

$ 39.76

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6.47ct Pink Rose Quartz, Round, Transparent

6.47ct Pink Rose Quartz, Round, Transparent

11 mm (calibrated)

$ 35.45

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0.40ct Orange Spessartite Garnet, Oval, VS-SI

0.40ct Orange Spessartite Garnet, Oval, VS-SI

4.7 x 3.7 mm

$ 13.94

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0.96ct Yellow Beryl, Trillion, VS

0.96ct Yellow Beryl, Trillion, VS

7 x 7 mm (calibrated)

$ 22.95

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3.44ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (381930)

3.44ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 137.36

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1.45ctw Multicolor Opal, Round, Translucent

1.45ctw Multicolor Opal, Round, Translucent

5 mm (calibrated)

$ 33.86

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1.21ct Yellow Beryl, Oval, VVS-VS

1.21ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 26.51

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2.22ctw Multicolor Opal, Oval, Translucent

2.22ctw Multicolor Opal, Oval, Translucent

9.8 x 6.6 mm

$ 55.83

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11.60ct Red Strawberry Quartz, Oval, Translucent

11.60ct Red Strawberry Quartz, Oval, Translucent

15.7 x 13 mm

$ 88.96

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9.06ct Pink Rose Quartz, Emerald Cut, Transparent

9.06ct Pink Rose Quartz, Emerald Cut, Transparent

12.6 x 12.4 mm

$ 49.63

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 17.11

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5.18ct Brown Tiger'S Eye, Oval, Opaque

5.18ct Brown Tiger'S Eye, Oval, Opaque

14.2 x 10.4 mm

$ 3.05

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2.34ct Pink Strawberry Quartz, Round, Translucent

2.34ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 14.31

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3.17ctw Red Pyrope Garnet, Heart, VVS-VS

3.17ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 24.31

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0.87ct Green Peridot, Oval, VVS-VS

0.87ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.80

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7.21ct Multicolor Labradorite, Pear Shape, Translucent

7.21ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 15.94

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18.01ctw Multicolor Jasper, Pear Shape, Opaque

18.01ctw Multicolor Jasper, Pear Shape, Opaque

20.4 x 13.7 mm

$ 10.86

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0.65ct Green Sphene, Oval, Transparent

0.65ct Green Sphene, Oval, Transparent

5.7 x 4.9 mm

$ 3.24

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1.38ct Orange Zircon, Emerald Cut, VVS

1.38ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 22.68

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40.48ct Multicolor Rainbow Moonstone, Fancy, Opaque

40.48ct Multicolor Rainbow Moonstone, Fancy, Opaque

37.3 x 12.5 mm

$ 4.03

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1.34ct Yellow Sphene, Oval, Transparent

1.34ct Yellow Sphene, Oval, Transparent

7.1 x 5.6 mm

$ 6.67

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2.42ct Orange Zircon, Oval, VVS

2.42ct Orange Zircon, Oval, VVS

7 x 6.3 mm

$ 55.24

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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 food

Posted By Keeto in July, 2025
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

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
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate
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