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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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15.19ct White Howlite, Oval, Opaque

15.19ct White Howlite, Oval, Opaque

21.7 x 14.4 mm

$ 7.26

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2.08ct Orange Hessonite Garnet, Cushion, VS-SI

2.08ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 35.42

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8.36ct Green Druzy Variscite, Fancy, Opaque

8.36ct Green Druzy Variscite, Fancy, Opaque

21.3 x 19.7 mm

$ 35.47

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6.68ct Multicolor Pietersite, Round, Opaque

6.68ct Multicolor Pietersite, Round, Opaque

16 mm (calibrated)

$ 15.77

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23.43ctw Multicolor Fossil Coral, Fancy, Opaque

23.43ctw Multicolor Fossil Coral, Fancy, Opaque

21.9 x 14.8 mm

$ 50.83

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4.11ct Red Almandine Garnet, Oval, VVS

4.11ct Red Almandine Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 153.51

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0.54ct Orange Spessartite Garnet, Pear Shape, VS

0.54ct Orange Spessartite Garnet, Pear Shape, VS

5.1 x 4.1 mm

$ 18.82

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4.33ctw Red Pyrope Garnet, Marquise, VVS-VS

4.33ctw Red Pyrope Garnet, Marquise, VVS-VS

11.8 x 6 mm

$ 37.95

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13.48ctw Black Spinel, Heart, Opaque

13.48ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 73.85

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2.18ct Multicolor Opal, Oval, Transparent

2.18ct Multicolor Opal, Oval, Transparent

11 x 8.1 mm

$ 97.71

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2.44ctw Pink Strawberry Quartz, Round, Translucent

2.44ctw Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 14.70

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27.29ct Yellow Calcite, Oval, Translucent

27.29ct Yellow Calcite, Oval, Translucent

29.7 x 17.1 mm

$ 18.76

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12.39ct Yellow Rutile Quartz, Pear Shape, Transparent

12.39ct Yellow Rutile Quartz, Pear Shape, Transparent

19 x 13.9 mm

$ 33.66

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5.85ct Green Jade, Oval, Opaque

5.85ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 11.65

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1.45ctw Yellow Citrine, Heart, VVS-VS

1.45ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.55

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4.21ct Orange Spessartite Garnet, Oval, Transparent

4.21ct Orange Spessartite Garnet, Oval, Transparent

10 x 8 mm (calibrated)

$ 104.83

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4.22ct Violet Amethyst, Round, Transparent

4.22ct Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 29.42

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1.28ct Pink Strawberry Quartz, Oval, Transparent

1.28ct Pink Strawberry Quartz, Oval, Transparent

7 x 5 mm (calibrated)

$ 5.82

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1.86ct Orange Hessonite Garnet, Cushion, VS-SI

1.86ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 33.35

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1.56ct Yellow Citrine, Round, VS

1.56ct Yellow Citrine, Round, VS

8 mm (calibrated)

$ 12.43

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1.57ct Orange Hessonite Garnet, Oval, VS

1.57ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.4 mm

$ 31.27

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2.60ct Multicolor Opal, Oval, Transparent

2.60ct Multicolor Opal, Oval, Transparent

11 x 8.4 mm

$ 65.39

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22.80ct Brown Tiger'S Eye, Fancy, Opaque

22.80ct Brown Tiger'S Eye, Fancy, Opaque

36.2 x 8.9 mm

$ 12.49

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2.92ctw Orange Hessonite Garnet, Emerald Cut, VS

2.92ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5.3 mm

$ 44.62

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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 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
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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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
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Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate
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