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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.03ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461509)

2.03ctw Green Demantoid Garnet, Oval, VS

4.8 x 4.1 mm

$ 185.34

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3.78ct Multicolor Opal, Pear Shape, Translucent

3.78ct Multicolor Opal, Pear Shape, Translucent

13.6 x 10 mm

$ 82.83

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7.18ct Pink Morganite, Oval, Transparent

7.18ct Pink Morganite, Oval, Transparent

11.9 x 10.8 mm

$ 78.67

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38.39ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447351)

38.39ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 57.35

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1.37ct Orange Sphalerite, Round, SI

1.37ct Orange Sphalerite, Round, SI

6.5 mm (calibrated)

$ 68.23

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0.84ct Yellow Color-Change Diaspore, Baguette, VVS-VS

0.84ct Yellow Color-Change Diaspore, Baguette, VVS-VS

13.9 x 2.8 mm

$ 44.34

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30.31ct Gray Hematite, Baguette, Opaque

30.31ct Gray Hematite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.93

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13.08ct Pink Rose Quartz, Emerald Cut, Transparent

13.08ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 71.65

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0.17ct Yellow Diamond, Round, VS-SI
Diamond Product Video (543913)

0.17ct Yellow Diamond, Round, VS-SI

3.5 mm (calibrated)

$ 306.68

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1.54ct Brown Diamond, Round, SI
Diamond Product Video (378644)

1.54ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 3,655.65

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45.75ct Multicolor Jasper, Fancy, Opaque

45.75ct Multicolor Jasper, Fancy, Opaque

37.2 x 22.5 mm

$ 50.13

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2.33ctw Pink Morganite, Oval, VVS-VS

2.33ctw Pink Morganite, Oval, VVS-VS

6 x 6 mm (calibrated)

$ 127.64

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37.40ct White Dendritic Agate, Fancy, Opaque

37.40ct White Dendritic Agate, Fancy, Opaque

31.7 x 22.1 mm

$ 26.08

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23.73ct Black Nuummite, Oval, Opaque

23.73ct Black Nuummite, Oval, Opaque

23.8 x 15.8 mm

$ 81.15

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0.86ct Orange Sphalerite, Trillion, SI-I1

0.86ct Orange Sphalerite, Trillion, SI-I1

5.8 x 5.6 mm

$ 42.83

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35.99ct Multicolor Jasper, Fancy, Opaque
Jasper Product Video (363525)

35.99ct Multicolor Jasper, Fancy, Opaque

31.7 x 23.7 mm

$ 59.15

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3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque
Lapis Lazuli Product Video (337538)

3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque

72.4 mm

$ 1,774.87

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1.07ct Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (415390)

1.07ct Green Tsavorite Garnet, Pear Shape, VS

8.1 x 5.2 mm

$ 703.38

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7.12ct Green Amazonite, Marquise, Opaque

7.12ct Green Amazonite, Marquise, Opaque

19.7 x 9.9 mm

$ 17.08

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30.85ct Multicolor Labradorite, Round, Translucent

30.85ct Multicolor Labradorite, Round, Translucent

25.2 mm

$ 40.22

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31.34ct Brown Moonstone, Oval, Opaque

31.34ct Brown Moonstone, Oval, Opaque

20.2 x 16.2 mm

$ 57.23

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19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 43.14

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382.95ct Pink Star Rose Quartz, Oval, Transparent/Translucent
Star Rose Quartz Product Video (354763)

382.95ct Pink Star Rose Quartz, Oval, Transparent/Translucent

44.4 x 42.5 mm

$ 635.70

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1.34ct Purple Sapphire, Cushion, VS
Sapphire Product Video (558376)

1.34ct Purple Sapphire, Cushion, VS

7.1 x 5.3 mm

$ 588.89

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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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
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I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

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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
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Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
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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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