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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
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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19.20ct Multicolor Agate, Oval, Opaque

19.20ct Multicolor Agate, Oval, Opaque

17.8 x 15.6 mm

$ 15.30

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1.64ct Orange Zircon, Round, VVS-VS

1.64ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 39.11

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25.97ct White Rainbow Moonstone, Oval, Translucent
Rainbow Moonstone Product Video (674102)

25.97ct White Rainbow Moonstone, Oval, Translucent

24.1 x 17.2 mm

$ 323.33

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28.63ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (350678)

28.63ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 125.46

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9.14ct Green Amazonite, Marquise, Opaque

9.14ct Green Amazonite, Marquise, Opaque

19.7 x 10.1 mm

$ 19.94

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3.51ct Purple Kunzite, Emerald Cut, VS
Kunzite Product Video (691524)

3.51ct Purple Kunzite, Emerald Cut, VS

7.6 x 7.6 mm

$ 80.49

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2.91ctw Blue Kyanite, Oval, SI

2.91ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 50.48

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0.11ct Black Diamond, Square, Opaque
Diamond Product Video (677914)

0.11ct Black Diamond, Square, Opaque

2.4 x 2.3 mm

$ 46.29

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48.08ct Multicolor Opal, Pear Shape, Opaque

48.08ct Multicolor Opal, Pear Shape, Opaque

40.1 x 27.1 mm

$ 143.66

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6.49ct Pink Morganite, Oval, Transparent

6.49ct Pink Morganite, Oval, Transparent

14 x 10 mm (calibrated)

$ 64.64

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0.87ct Pink Malaya Garnet, Marquise, VS

0.87ct Pink Malaya Garnet, Marquise, VS

8.7 x 4.6 mm

$ 40.03

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0.21ctw White Diamond, Round, VVS-VS
Diamond Product Video (565089)

0.21ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 381.55

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1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.31ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5.3 mm

$ 57.72

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3.24ct Orange Spessartite Garnet, Oval, Transparent

3.24ct Orange Spessartite Garnet, Oval, Transparent

9.6 x 7.7 mm

$ 67.23

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19.58ct Pink Coral, Flower Cut, Opaque
Coral Product Video (256350)

19.58ct Pink Coral, Flower Cut, Opaque

18.2 x 16.9 mm

$ 286.03

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10.63ct Yellow Apatite, Heart, VS-SI
Apatite Product Video (384011)

10.63ct Yellow Apatite, Heart, VS-SI

14 x 14 mm (calibrated)

$ 621.67

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8.44ct Blue Turquoise, Pear Shape, Opaque

8.44ct Blue Turquoise, Pear Shape, Opaque

21.5 x 12.4 mm

$ 33.62

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3.45ctw Multicolor Andalusite, Oval, VS-SI

3.45ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 170.10

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4.39ctw Pink Strawberry Quartz, Round, Translucent

4.39ctw Pink Strawberry Quartz, Round, Translucent

8.5 mm (calibrated)

$ 67.34

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.6 mm (calibrated)

$ 254.36

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10.38ct Black Tourmaline, Pear Shape, Opaque

10.38ct Black Tourmaline, Pear Shape, Opaque

16 x 12.7 mm

$ 51.69

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1.04ct Yellow Sphalerite, Oval, SI-I1

1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

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1.11ct Orange Hessonite Garnet, Round, SI-I1
Hessonite Garnet Product Video (546440)

1.11ct Orange Hessonite Garnet, Round, SI-I1

6 mm (calibrated)

$ 15.58

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6.68ct Brown Moonstone, Flower Cut, Translucent
Moonstone Product Video (485314)

6.68ct Brown Moonstone, Flower Cut, Translucent

14 x 14 mm (calibrated)

$ 29.27

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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

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
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Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
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Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate
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