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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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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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1.05ct Multicolor Opal, Oval, Transparent

1.05ct Multicolor Opal, Oval, Transparent

9.3 x 7.3 mm

$ 26.15

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2.14ct Green Tourmaline, Emerald Cut, VVS

2.14ct Green Tourmaline, Emerald Cut, VVS

19.9 x 3.8 mm

$ 58.61

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3.70ct Yellow Rutile Topaz, Oval, Transparent

3.70ct Yellow Rutile Topaz, Oval, Transparent

11.1 x 8.3 mm

$ 76.78

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2.38ct Yellow Citrine, Trillion, VVS-VS

2.38ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 18.26

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16.21ct Multicolor Agate, Oval, Opaque

16.21ct Multicolor Agate, Oval, Opaque

19.4 x 12.9 mm

$ 16.14

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1.15ct Yellow Citrine, Round, VVS-VS

1.15ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 9.16

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1.38ct Green Tourmaline, Cushion, VS

1.38ct Green Tourmaline, Cushion, VS

8 x 6 mm (calibrated)

$ 160.36

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15.10ct Multicolor Agate, Fancy, Opaque

15.10ct Multicolor Agate, Fancy, Opaque

15 x 10 mm (calibrated)

$ 26.44

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19.44ct Violet Charoite, Fancy, Opaque

19.44ct Violet Charoite, Fancy, Opaque

24.8 x 16.3 mm

$ 32.14

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0.65ct Orange Spessartite Garnet, Oval, VS-SI

0.65ct Orange Spessartite Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 21.58

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2.37ct Orange Hessonite Garnet, Oval, VS-SI

2.37ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 51.93

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7.45ct Yellow Rutile Quartz, Pear Shape, Translucent

7.45ct Yellow Rutile Quartz, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 20.25

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5.60ct Black Tourmaline, Emerald Cut, Opaque

5.60ct Black Tourmaline, Emerald Cut, Opaque

16.7 x 7.6 mm

$ 27.89

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15.33ct Black Nuummite, Oval, Opaque

15.33ct Black Nuummite, Oval, Opaque

17.5 x 15.8 mm

$ 67.34

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2.60ctw Red Rhodolite Garnet, Square, VS

2.60ctw Red Rhodolite Garnet, Square, VS

4.8 x 4.8 mm

$ 22.76

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7.02ct Violet Amethyst, Pear Shape, VVS-VS

7.02ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 55.53

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3.41ct Yellow Citrine, Square, VS

3.41ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 22.42

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1.49ct Purple Spinel, Cushion, VS

1.49ct Purple Spinel, Cushion, VS

6.7 x 5.5 mm

$ 93.11

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7.38ct Pink Strawberry Quartz, Oval, Translucent

7.38ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 44.31

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13.31ct Red Star Garnet, Oval, Opaque

13.31ct Red Star Garnet, Oval, Opaque

14 x 12 mm (calibrated)

$ 13.13

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14.20ct Brown Tiger'S Eye, Marquise, Opaque

14.20ct Brown Tiger'S Eye, Marquise, Opaque

26.7 x 13.8 mm

$ 15.55

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32.75ct Gray Hematite, Square, Opaque
Hematite Product Video (554029)

32.75ct Gray Hematite, Square, Opaque

19 x 18.4 mm

$ 33.01

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2.04ct Green Peridot, Cushion, VS

2.04ct Green Peridot, Cushion, VS

7.6 x 7 mm

$ 78.23

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 15.94

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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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

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 -> 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 -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 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
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