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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
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Untreated Gemstones Treatment

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For Example: 8-9
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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12.69ct White Rainbow Moonstone, Pear Shape, Translucent

12.69ct White Rainbow Moonstone, Pear Shape, Translucent

19.4 x 14.2 mm

$ 88.48

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4.17ct Brown Mother Of Pearl, Fancy, Opaque

4.17ct Brown Mother Of Pearl, Fancy, Opaque

19.3 x 12.4 mm

$ 9.60

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3.26ctw Red Pyrope Garnet, Marquise, VS

3.26ctw Red Pyrope Garnet, Marquise, VS

11.9 x 5.9 mm

$ 28.58

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8.82ct Green Amazonite, Pear Shape, Opaque

8.82ct Green Amazonite, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 8.96

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1.89ct Pink Strawberry Quartz, Round, Translucent

1.89ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.49

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2.92ct Violet Amethyst, Trillion, VVS

2.92ct Violet Amethyst, Trillion, VVS

10 x 10 mm (calibrated)

$ 20.36

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3.12ctw Yellow Citrine, Square, VS

3.12ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 21.67

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2.67ct Pink Tourmaline, Emerald Cut, SI

2.67ct Pink Tourmaline, Emerald Cut, SI

8.2 x 7.3 mm

$ 201.84

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21.52ctw Multicolor Fossil Coral, Oval, Opaque

21.52ctw Multicolor Fossil Coral, Oval, Opaque

18.4 x 12.2 mm

$ 27.82

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4.93ct Violet Amethyst, Pear Shape, VS

4.93ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 32.41

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1.82ct Orange Hessonite Garnet, Cushion, VS-SI

1.82ct Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 39.88

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3.93ct Yellow Apatite, Heart, VS

3.93ct Yellow Apatite, Heart, VS

11.4 x 10.3 mm

$ 179.55

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1.40ct Green Apatite, Pear Shape, VS

1.40ct Green Apatite, Pear Shape, VS

9 x 6 mm (calibrated)

$ 65.93

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0.87ctw Red Pyrope Garnet, Square, VVS-VS

0.87ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.67

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7.57ctw Violet Amethyst, Oval, Transparent

7.57ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.48

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6.06ct Turquoise Hemimorphite Druzy, Fancy, Opaque

6.06ct Turquoise Hemimorphite Druzy, Fancy, Opaque

16.6 x 8.9 mm

$ 99.59

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4.09ct Yellow Citrine, Emerald Cut, VVS

4.09ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 31.37

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6.20ct White Rutile Quartz, Round, Transparent

6.20ct White Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 15.55

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26.55ctw Red Ruby-Zoisite, Flower Cut, Opaque

26.55ctw Red Ruby-Zoisite, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 31.71

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3.44ct Yellow Citrine, Pear Shape, VVS-VS

3.44ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 21.60

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0.82ctw White Rainbow Moonstone, Marquise, Transparent

0.82ctw White Rainbow Moonstone, Marquise, Transparent

6 x 4 mm (calibrated)

$ 26.96

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4.00ct Yellow Rutile Topaz, Oval, Transparent

4.00ct Yellow Rutile Topaz, Oval, Transparent

11 x 9 mm (calibrated)

$ 83.00

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2.07ctw Pink Strawberry Quartz, Oval, Translucent

2.07ctw Pink Strawberry Quartz, Oval, Translucent

7.7 x 5.9 mm

$ 26.18

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11.46ctw Blue Chalcedony, Oval, Translucent

11.46ctw Blue Chalcedony, Oval, Translucent

14 x 10 mm (calibrated)

$ 9.55

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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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
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 -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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