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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
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.76ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.76ct Yellow Color-Change Diaspore, Cushion, VVS-VS

5.4 x 5 mm

$ 40.12

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8.29ct Multicolor Ruby-Zoisite, Baguette, Opaque
Ruby-Zoisite Product Video (338228)

8.29ct Multicolor Ruby-Zoisite, Baguette, Opaque

11.4 x 10.1 mm

$ 22.70

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0.89ct Pink Morganite, Pear Shape, VVS

0.89ct Pink Morganite, Pear Shape, VVS

9.4 x 4.7 mm

$ 53.63

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3.64ctw Brown Smoky Quartz, Round, VVS-VS

3.64ctw Brown Smoky Quartz, Round, VVS-VS

7.5 mm (calibrated)

$ 7.98

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0.62ct Orange Sphalerite, Oval, SI

0.62ct Orange Sphalerite, Oval, SI

6 x 4 mm (calibrated)

$ 30.88

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3.07ctw Yellow Citrine, Square, VVS-VS

3.07ctw Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 23.55

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2.96ct Yellow Citrine, Emerald Cut, VVS-VS

2.96ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 22.70

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1.54ct White Sillimanite Cat'S Eye, Oval, Translucent

1.54ct White Sillimanite Cat'S Eye, Oval, Translucent

7.8 x 5.7 mm

$ 5.06

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3.98ct Orange Spessartite Garnet, Oval, Transparent

3.98ct Orange Spessartite Garnet, Oval, Transparent

8.4 x 7.9 mm

$ 99.10

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5.53ctw Green Peridot, Oval, VS

5.53ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 55.08

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10.96ct Blue Druzy Azurite, Pear Shape, Opaque

10.96ct Blue Druzy Azurite, Pear Shape, Opaque

22.4 x 13.9 mm

$ 35.15

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4.83ct Pink Kunzite, Pear Shape, VVS

4.83ct Pink Kunzite, Pear Shape, VVS

11 x 9 mm (calibrated)

$ 110.76

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4.19ctw Yellow Citrine, Oval, VVS-VS

4.19ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 27.54

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2.29ct Violet Amethyst, Square, VVS-VS

2.29ct Violet Amethyst, Square, VVS-VS

8 x 8 mm (calibrated)

$ 18.24

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1.43ct Orange Hessonite Garnet, Cushion, VS

1.43ct Orange Hessonite Garnet, Cushion, VS

7 x 5 mm (calibrated)

$ 25.64

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12.87ct Violet Amethyst, Cushion, VVS

12.87ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 102.55

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1.08ct Green Peridot, Oval, VS

1.08ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 16.57

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1.03ct Multicolor Opal, Oval, Transparent

1.03ct Multicolor Opal, Oval, Transparent

9.2 x 6.4 mm

$ 33.86

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22.29ctw Multicolor Fossil Coral, Cushion, Opaque

22.29ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 12 mm (calibrated)

$ 48.35

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1.49ct Orange Zircon, Round, VS

1.49ct Orange Zircon, Round, VS

6.5 mm (calibrated)

$ 32.65

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11.74ct Black Star Diopside, Round, Opaque

11.74ct Black Star Diopside, Round, Opaque

12 mm (calibrated)

$ 58.47

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3.86ct Pink Morganite, Marquise, Transparent

3.86ct Pink Morganite, Marquise, Transparent

16 x 8 mm (calibrated)

$ 42.29

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45.54ct Violet Charoite, Cushion, Opaque
Charoite Product Video (567105)

45.54ct Violet Charoite, Cushion, Opaque

32.4 x 26.1 mm

$ 85.32

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5.21ct Yellow Citrine, Emerald Cut, VVS-VS

5.21ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 36.32

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 -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

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

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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

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