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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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38.31ct Multicolor Jasper, Baguette, Opaque

38.31ct Multicolor Jasper, Baguette, Opaque

27 x 20 mm (calibrated)

$ 23.51

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34.37ct Bi-Color Ametrine, Oval, VVS

34.37ct Bi-Color Ametrine, Oval, VVS

25.5 x 19 mm

$ 188.29

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0.68ct Yellow Citrine, Heart, Transparent

0.68ct Yellow Citrine, Heart, Transparent

6.3 x 6 mm

$ 4.74

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1.58ct Green Tourmaline, Emerald Cut, VVS-VS

1.58ct Green Tourmaline, Emerald Cut, VVS-VS

17.2 x 3.5 mm

$ 33.72

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1.22ct Green Peridot, Oval, VS

1.22ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 10.94

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4.40ct Yellow Citrine, Emerald Cut, VVS

4.40ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 33.75

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2.54ct Multicolor Opal, Pear Shape, Transparent

2.54ct Multicolor Opal, Pear Shape, Transparent

15 x 10 mm (calibrated)

$ 113.84

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8.15ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

8.15ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 24.35

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3.57ct Multicolor Opal, Oval, Transparent

3.57ct Multicolor Opal, Oval, Transparent

15.4 x 9.6 mm

$ 89.75

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90.31ct Green Moss Agate, Square, Opaque

90.31ct Green Moss Agate, Square, Opaque

27.1 x 26.8 mm

$ 74.96

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3.01ct Violet Amethyst, Trillion, VS

3.01ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.98

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0.93ct Green Peridot, Oval, VS

0.93ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.48

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1.61ct Red Almandine Garnet, Baguette, VVS
Almandine Garnet Product Video (743158)

1.61ct Red Almandine Garnet, Baguette, VVS

9.9 x 4.8 mm

$ 60.13

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2.74ct Pink Strawberry Quartz, Oval, Transparent

2.74ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 20.55

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4.41ct Red Strawberry Quartz, Oval, Translucent

4.41ct Red Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 23.27

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5.30ct Violet Amethyst, Pear Shape, VS

5.30ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 40.65

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2.10ct Orange Hessonite Garnet, Cushion, VS-SI

2.10ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 39.64

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0.67ct Yellow Citrine, Heart, VVS-VS

0.67ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 4.67

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8.63ctw Green Prehnite, Fancy, Translucent

8.63ctw Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 14.18

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44.78ct Gray Hematite, Oval, Opaque

44.78ct Gray Hematite, Oval, Opaque

23.6 x 18.7 mm

$ 43.67

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2.66ctw Yellow Citrine, Emerald Cut, VVS-VS

2.66ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.40

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45.90ct White Rainbow Moonstone, Oval, Translucent

45.90ct White Rainbow Moonstone, Oval, Translucent

32.4 x 23.6 mm

$ 38.10

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1.25ct Green Tourmaline, Emerald Cut, VVS-VS

1.25ct Green Tourmaline, Emerald Cut, VVS-VS

16.5 x 3.1 mm

$ 41.09

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48.61ct Violet Amethyst, Heart, VVS
Amethyst Product Video (734712)

48.61ct Violet Amethyst, Heart, VVS

24.1 x 23.2 mm

$ 387.33

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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

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

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
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

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate
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