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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

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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3.10ctw Multicolor Opal, Square, Translucent

3.10ctw Multicolor Opal, Square, Translucent

3.7 x 3.6 mm

$ 22.01

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12.02ctw Brown Hessonite Garnet, Oval, Translucent

12.02ctw Brown Hessonite Garnet, Oval, Translucent

14 x 9 mm (calibrated)

$ 65.84

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3.58ctw Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (609261)

3.58ctw Violet Amethyst, Oval, VVS-VS

12.1 x 6.1 mm

$ 27.46

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0.88ct Green Peridot, Oval, VVS-VS

0.88ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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3.43ct Pink Kunzite, Emerald Cut, VS

3.43ct Pink Kunzite, Emerald Cut, VS

8.7 x 6.6 mm

$ 85.41

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0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 71.71

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3.49ct Yellow Citrine, Oval, VVS-VS

3.49ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.80

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4.95ct Multicolor Pietersite, Oval, Opaque

4.95ct Multicolor Pietersite, Oval, Opaque

13.3 x 9.5 mm

$ 16.28

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0.15ct White Diamond, Round, VS

0.15ct White Diamond, Round, VS

3.5 mm (calibrated)

$ 251.84

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9.22ct Pink Kunzite, Emerald Cut, VVS-VS
Kunzite Product Video (694765)

9.22ct Pink Kunzite, Emerald Cut, VVS-VS

13 x 9 mm (calibrated)

$ 229.58

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2.83ctw Yellow Beryl, Oval, VVS

2.83ctw Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 56.37

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3.79ct Green Chrysoprase, Cushion, Translucent

3.79ct Green Chrysoprase, Cushion, Translucent

11.8 x 7.2 mm

$ 31.46

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52.47ct White Dendritic Agate, Pear Shape, Opaque

52.47ct White Dendritic Agate, Pear Shape, Opaque

45.6 x 21.9 mm

$ 36.59

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1.24ct Orange Tourmaline, Oval, VVS-VS

1.24ct Orange Tourmaline, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 144.09

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1.63ct Yellow Beryl, Round, VVS

1.63ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 32.47

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2.39ctw White Rainbow Moonstone, Oval, Transparent

2.39ctw White Rainbow Moonstone, Oval, Transparent

7 x 6 mm

$ 46.81

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1.54ctw Green Peridot, Oval, VVS-VS

1.54ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 24.54

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1.20ct Yellow Color-Change Diaspore, Oval, SI

1.20ct Yellow Color-Change Diaspore, Oval, SI

6.4 x 5.2 mm

$ 63.95

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4.28ctw Red Pyrope Garnet, Marquise, VVS-VS

4.28ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 5.9 mm

$ 47.03

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8.87ct Green Prehnite, Fancy, Translucent

8.87ct Green Prehnite, Fancy, Translucent

16.6 x 11.2 mm

$ 14.57

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1.73ct Yellow Citrine, Round, VVS

1.73ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.06

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1.59ct Multicolor Opal, Oval, Transparent

1.59ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 69.68

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8.00ct Green Amazonite, Marquise, Opaque

8.00ct Green Amazonite, Marquise, Opaque

18.4 x 9.3 mm

$ 19.54

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2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 20.60

View Gem
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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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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