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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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1.63ctw Green Demantoid Garnet, Round, VS-SI

1.63ctw Green Demantoid Garnet, Round, VS-SI

3.4 mm

$ 71.43

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4.96ct Red Strawberry Quartz, Oval, Translucent

4.96ct Red Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 29.89

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2.04ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458262)

2.04ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.6 mm

$ 223.50

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1.27ct Pink Tourmaline, Round, Transparent

1.27ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 21.77

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1.04ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.04ct Orange Hessonite Garnet, Pear Shape, VS-SI

7 x 5 mm (calibrated)

$ 19.37

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2.80ct Orange Moonstone, Cushion, Translucent

2.80ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.58

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6.12ct Brown Smoky Quartz, Flower Cut, Transparent

6.12ct Brown Smoky Quartz, Flower Cut, Transparent

14 x 10.2 mm

$ 22.74

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2.03ct Orange Hessonite Garnet, Cushion, VS-SI

2.03ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 38.33

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6.63ct Yellow Citrine, Emerald Cut, VVS-VS

6.63ct Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 50.85

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1.29ct Yellow Citrine, Emerald Cut, VVS-VS

1.29ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.00

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0.55ct Green Peridot, Marquise, VS

0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

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2.96ctw White Rainbow Moonstone, Square, Transparent

2.96ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 46.75

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3.16ctw White Rainbow Moonstone, Pear Shape, Transparent

3.16ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 69.24

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4.03ctw Red Pyrope Garnet, Square, VS

4.03ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.91

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7.73ctw Red Pyrope Garnet, Marquise, VVS-VS

7.73ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm (calibrated)

$ 69.52

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18.88ct White Dendritic Agate, Fancy, Opaque

18.88ct White Dendritic Agate, Fancy, Opaque

22.1 x 14.9 mm

$ 13.16

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7.81ct Blue Aquamarine, Emerald Cut, Translucent
Aquamarine Product Video (730375)

7.81ct Blue Aquamarine, Emerald Cut, Translucent

14 x 10 mm (calibrated)

$ 162.06

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0.56ct Green Peridot, Marquise, VVS-VS

0.56ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 8.37

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1.08ct Brown Color-Change Garnet, Oval, VS

1.08ct Brown Color-Change Garnet, Oval, VS

6.5 x 4.7 mm

$ 86.29

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3.13ct Yellow Beryl, Oval, VVS

3.13ct Yellow Beryl, Oval, VVS

11 x 9 mm (calibrated)

$ 68.58

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2.17ct Red Almandine Garnet, Oval, VS

2.17ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 81.05

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19.29ct Brown Tiger'S Eye, Baguette, Opaque

19.29ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.21

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9.32ct Multicolor Agate, Oval, Opaque

9.32ct Multicolor Agate, Oval, Opaque

14 x 12 mm (calibrated)

$ 9.28

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1.83ct Yellow Citrine, Emerald Cut, VS

1.83ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 14.58

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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

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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