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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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3.11ctw Red Spessartite Garnet, Round, VVS-VS

3.11ctw Red Spessartite Garnet, Round, VVS-VS

5 mm (calibrated)

$ 105.63

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1.75ctw Green Peridot, Oval, VVS-VS

1.75ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 24.40

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1.04ctw Green Peridot, Marquise, VS

1.04ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.28

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2.04ct Orange Hessonite Garnet, Cushion, VS-SI

2.04ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 33.06

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5.43ct Brown Smoky Quartz, Emerald Cut, VVS

5.43ct Brown Smoky Quartz, Emerald Cut, VVS

10 x 10 mm (calibrated)

$ 29.75

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7.06ct Gray Star Sapphire, Oval, Opaque
Star Sapphire Product Video (470846)

7.06ct Gray Star Sapphire, Oval, Opaque

7.6 x 8.6 mm

$ 270.72

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0.44ct Yellow Sphalerite, Round, SI-I1

0.44ct Yellow Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 21.91

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2.23ct Red Almandine Garnet, Oval, VS

2.23ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 83.29

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3.30ct Brown Tiger'S Eye, Oval, Opaque

3.30ct Brown Tiger'S Eye, Oval, Opaque

10.5 x 8.1 mm

$ 3.29

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63.14ct Multicolor Coral, Cushion, Opaque

63.14ct Multicolor Coral, Cushion, Opaque

38.3 x 32 mm

$ 92.69

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1.43ct Pink Tourmaline, Oval, VS

1.43ct Pink Tourmaline, Oval, VS

7.3 x 6.5 mm

$ 71.50

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2.78ctw Orange Citrine, Oval, VVS-VS

2.78ctw Orange Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 27.69

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1.64ct Yellow Citrine, Emerald Cut, VVS

1.64ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 13.06

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12.25ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (628410)

12.25ct Multicolor Boulder Opal, Fancy, Opaque

30.2 x 15.8 mm

$ 61.01

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24.85ctw Blue Chalcedony, Flower Cut, Translucent

24.85ctw Blue Chalcedony, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 27.23

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1.03ct Orange Moonstone, Pear Shape, Transparent

1.03ct Orange Moonstone, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 2.05

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15.32ct Violet Amethyst, Emerald Cut, VVS-VS

15.32ct Violet Amethyst, Emerald Cut, VVS-VS

18 x 13 mm (calibrated)

$ 106.81

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1.12ct Pink Malaya Garnet, Oval, VS

1.12ct Pink Malaya Garnet, Oval, VS

7.1 x 5.2 mm

$ 36.81

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4.33ct Brown Smoky Quartz, Round, VVS-VS

4.33ct Brown Smoky Quartz, Round, VVS-VS

11.5 mm

$ 7.12

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1.18ct Green Sphene, Oval, Transparent

1.18ct Green Sphene, Oval, Transparent

6.7 x 6.1 mm

$ 5.88

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2.09ctw Orange Sunstone, Oval, Translucent

2.09ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 16.03

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2.33ctw Red Rhodolite Garnet, Square, VS

2.33ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 20.40

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1.03ct Multicolor Opal, Round, Translucent

1.03ct Multicolor Opal, Round, Translucent

7 mm (calibrated)

$ 24.05

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0.92ct Purple Spinel, Cushion, VS

0.92ct Purple Spinel, Cushion, VS

6.3 x 5.3 mm

$ 137.45

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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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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
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Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 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
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