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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

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0.77ct Pink Morganite, Oval, VS

0.77ct Pink Morganite, Oval, VS

7.6 x 5.8 mm

$ 34.51

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1.64ct Green Prehnite, Pear Shape, Transparent/Translucent

1.64ct Green Prehnite, Pear Shape, Transparent/Translucent

8.4 x 6.1 mm

$ 8.98

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3.81ctw Violet Amethyst, Oval, VVS-VS

3.81ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 20.87

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12.18ct Multicolor Jasper, Cushion, Opaque

12.18ct Multicolor Jasper, Cushion, Opaque

19 x 16.7 mm

$ 13.35

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0.83ct White Sillimanite Cat'S Eye, Oval, Transparent

0.83ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 4.5 mm

$ 2.60

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36.87ct White Dendritic Agate, Pear Shape, Opaque

36.87ct White Dendritic Agate, Pear Shape, Opaque

37.5 x 25.8 mm

$ 25.71

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2.03ct Orange Hessonite Garnet, Cushion, VS

2.03ct Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 30.19

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0.94ct Pink Morganite, Heart, VVS-VS
Morganite Product Video (473604)

0.94ct Pink Morganite, Heart, VVS-VS

6.2 x 6.8 mm

$ 82.39

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0.70ct Green Tourmaline, Emerald Cut, VVS

0.70ct Green Tourmaline, Emerald Cut, VVS

10.3 x 3.4 mm

$ 34.86

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3.74ctw Yellow Sphene, Oval, Translucent

3.74ctw Yellow Sphene, Oval, Translucent

7.6 x 6.6 mm

$ 18.63

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5.96ctw Red Almandine Garnet, Round, Transparent

5.96ctw Red Almandine Garnet, Round, Transparent

3.2 mm

$ 32.65

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3.60ctw Red Pyrope Garnet, Marquise, VVS-VS

3.60ctw Red Pyrope Garnet, Marquise, VVS-VS

12.2 x 6 mm

$ 63.10

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

1.9 mm

$ 8.36

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0.66ct Yellow Citrine, Pear Shape, VVS-VS

0.66ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 3.60

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2.71ct Violet Amethyst, Trillion, VS

2.71ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 14.85

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3.76ct Pink Strawberry Quartz, Oval, Translucent

3.76ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 28.83

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0.78ct Brown Chocolate Opal, Oval, Translucent

0.78ct Brown Chocolate Opal, Oval, Translucent

8 x 6.3 mm

$ 25.64

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5.83ct Green Actinolite Cat'S Eye, Oval, Translucent

5.83ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 11.2 mm

$ 40.65

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1.47ctw Multicolor Opal, Oval, Transparent

1.47ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 64.42

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11.27ct Black Tourmaline, Oval, Opaque

11.27ct Black Tourmaline, Oval, Opaque

14.9 x 13.2 mm

$ 56.12

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6.17ct Green Malachite, Baguette, Opaque

6.17ct Green Malachite, Baguette, Opaque

10.6 x 8.6 mm

$ 6.71

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4.07ctw Violet Amethyst, Square, VVS-VS

4.07ctw Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 28.38

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7.82ct Multicolor Agate, Round, Opaque

7.82ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 13.24

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13.03ct Green Jadeite, Oval, Translucent

13.03ct Green Jadeite, Oval, Translucent

20 x 16 mm

$ 21.41

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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

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

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 -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate
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