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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
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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2.00ct Pink Strawberry Quartz, Oval, Translucent

2.00ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.99

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4.91ctw Pink Strawberry Quartz, Oval, Transparent

4.91ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 36.49

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3.78ctw Yellow Sphene, Oval, Transparent

3.78ctw Yellow Sphene, Oval, Transparent

7 x 7 mm (calibrated)

$ 18.82

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0.79ct Orange Fire Opal, Oval, Transparent

0.79ct Orange Fire Opal, Oval, Transparent

8.4 x 6.2 mm

$ 27.54

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0.57ct White Rainbow Moonstone, Baguette, Transparent

0.57ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 19.87

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60.40ct Multicolor Agate, Fancy, Opaque

60.40ct Multicolor Agate, Fancy, Opaque

25.3 x 15.3 mm

$ 105.78

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3.14ctw White Rainbow Moonstone, Square, Transparent/Translucent
Rainbow Moonstone Product Video (350516)

3.14ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.1 x 3.1 mm

$ 52.12

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18.84ct White Agate, Oval, Opaque

18.84ct White Agate, Oval, Opaque

23.2 x 15.8 mm

$ 29.84

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2.88ctw White Topaz, Oval, VVS-VS

2.88ctw White Topaz, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 20.08

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4.15ctw Violet Amethyst, Oval, VVS-VS

4.15ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.74

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36.40ct Multicolor Jasper, Oval, Opaque

36.40ct Multicolor Jasper, Oval, Opaque

33.9 x 24.4 mm

$ 24.73

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7.42ct Yellow Rutile Topaz, Pear Shape, Transparent

7.42ct Yellow Rutile Topaz, Pear Shape, Transparent

16.4 x 10.4 mm

$ 153.97

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13.52ct Brown Smoky Quartz, Round, VVS-VS

13.52ct Brown Smoky Quartz, Round, VVS-VS

17 mm (calibrated)

$ 16.44

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0.23ct Green Kornerupine, Round, VS

0.23ct Green Kornerupine, Round, VS

3.5 mm (calibrated)

$ 78.97

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4.33ct Red Almandine Garnet, Pear Shape, VVS-VS

4.33ct Red Almandine Garnet, Pear Shape, VVS-VS

11.6 x 9.6 mm

$ 125.79

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15.79ctw Brown Tiger'S Eye, Baguette, Opaque

15.79ctw Brown Tiger'S Eye, Baguette, Opaque

14.4 x 10.7 mm

$ 15.73

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6.37ct Blue Larimar, Round, Opaque

6.37ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 44.11

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0.86ct Pink Tourmaline, Round, Transparent

0.86ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 14.74

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5.87ct Violet Amethyst, Pear Shape, VVS-VS

5.87ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 45.02

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1.25ct Yellow Citrine, Emerald Cut, VS

1.25ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 8.72

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1.83ct Orange Hessonite Garnet, Cushion, VS

1.83ct Orange Hessonite Garnet, Cushion, VS

6 x 6 mm (calibrated)

$ 27.27

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3.82ct Pink Strawberry Quartz, Oval, Translucent

3.82ct Pink Strawberry Quartz, Oval, Translucent

10.4 x 8.7 mm

$ 23.02

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18.89ct Multicolor Jasper, Oval, Opaque

18.89ct Multicolor Jasper, Oval, Opaque

31.5 x 21.2 mm

$ 31.04

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4.02ctw Yellow Citrine, Oval, VS

4.02ctw Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 22.02

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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

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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
→ View All GemSelect Reviews on Bizrate
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