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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
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Untreated Gemstones Treatment

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5.77ct Yellow Citrine, Oval, VVS

5.77ct Yellow Citrine, Oval, VVS

13.9 x 10.4 mm

$ 37.93

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6.16ct Yellow Citrine, Round, VVS

6.16ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 47.24

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41.42ct Multicolor Jasper, Pear Shape, Opaque

41.42ct Multicolor Jasper, Pear Shape, Opaque

37.6 x 24.1 mm

$ 19.51

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1.23ct Yellow Citrine, Round, VS

1.23ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 8.17

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10.99ct Green Rutile Quartz, Oval, Transparent

10.99ct Green Rutile Quartz, Oval, Transparent

19.3 x 12 mm

$ 21.78

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3.57ctw Brown Smoky Quartz, Round, VS

3.57ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.82

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21.77ct White Dendritic Agate, Fancy, Opaque

21.77ct White Dendritic Agate, Fancy, Opaque

28.8 x 18.5 mm

$ 15.18

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0.93ct Yellow Citrine, Emerald Cut, VVS

0.93ct Yellow Citrine, Emerald Cut, VVS

7.7 x 5.7 mm

$ 6.48

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4.80ct Orange Sunstone, Round, Translucent

4.80ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 29.29

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0.72ct Blue Kyanite, Round, SI

0.72ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 17.93

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9.25ct Purple Kunzite, Oval, VS
Kunzite Product Video (409935)

9.25ct Purple Kunzite, Oval, VS

16.1 x 9.3 mm

$ 261.96

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2.63ct Green Tourmaline, Emerald Cut, VVS-VS

2.63ct Green Tourmaline, Emerald Cut, VVS-VS

16.1 x 4.5 mm

$ 72.04

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6.61ct Violet Kunzite, Cushion, VS
Kunzite Product Video (453516)

6.61ct Violet Kunzite, Cushion, VS

14.4 x 8.1 mm

$ 181.06

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0.57ct Orange Spessartite Garnet, Oval, VVS-VS

0.57ct Orange Spessartite Garnet, Oval, VVS-VS

5 x 4 mm (calibrated)

$ 19.87

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1.06ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

1.06ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

7.5 x 4.5 mm

$ 56.92

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 17.11

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1.00ct Brown Color-Change Garnet, Oval, VS

1.00ct Brown Color-Change Garnet, Oval, VS

6.3 x 4.8 mm

$ 79.89

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3.84ct Multicolor Opal, Oval, Transparent

3.84ct Multicolor Opal, Oval, Transparent

15 x 10 mm (calibrated)

$ 96.53

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1.76ct Yellow Citrine, Round, VVS-VS

1.76ct Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 14.03

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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0.59ct Yellow Beryl, Oval, VVS-VS

0.59ct Yellow Beryl, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 14.69

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1.85ct Orange Citrine, Round, VS

1.85ct Orange Citrine, Round, VS

8 mm (calibrated)

$ 15.36

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21.82ct Multicolor Agate, Oval, Opaque

21.82ct Multicolor Agate, Oval, Opaque

16.9 x 15 mm

$ 14.49

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0.86ct Green Tourmaline, Baguette, VVS

0.86ct Green Tourmaline, Baguette, VVS

11 x 3.6 mm

$ 42.83

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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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 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

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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