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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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6.36ct Multicolor Agate, Oval, Opaque

6.36ct Multicolor Agate, Oval, Opaque

11.9 x 10.5 mm

$ 6.02

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3.28ct Multicolor Opal, Oval, Transparent

3.28ct Multicolor Opal, Oval, Transparent

13.2 x 9.7 mm

$ 81.67

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31.95ct Green Aventurine, Fancy, Opaque

31.95ct Green Aventurine, Fancy, Opaque

42.4 x 10 mm

$ 2.66

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0.90ctw Red Pyrope Garnet, Square, VS

0.90ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.91

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0.80ct Orange Zircon, Oval, VVS

0.80ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.95

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10.92ct Green Uvarovite Garnet Drusy, Fancy, Opaque

10.92ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18 x 13 mm (calibrated)

$ 16.32

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10.88ctw Violet Amethyst, Cushion, VS

10.88ctw Violet Amethyst, Cushion, VS

15.1 x 9.2 mm

$ 75.85

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6.62ct Brown Smoky Quartz, Emerald Cut, VVS-VS

6.62ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 12.99

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0.88ctw White Rainbow Moonstone, Oval, Transparent

0.88ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 28.93

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0.80ct Multicolor Labradorite, Pear Shape, Translucent

0.80ct Multicolor Labradorite, Pear Shape, Translucent

6.2 x 4.2 mm

$ 1.78

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2.78ct Yellow Rutile Topaz, Pear Shape, Transparent

2.78ct Yellow Rutile Topaz, Pear Shape, Transparent

10.9 x 7.7 mm

$ 57.69

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11.34ct Multicolor Fire Agate, Fancy, Opaque

11.34ct Multicolor Fire Agate, Fancy, Opaque

19.9 x 11.3 mm

$ 85.22

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8.20ct Pink Rose Quartz, Emerald Cut, Transparent

8.20ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 44.92

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0.18ct Yellow Diamond, Round, VS
Diamond Product Video (543901)

0.18ct Yellow Diamond, Round, VS

3.5 mm (calibrated)

$ 324.71

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0.50ct Blue Kyanite, Round, SI

0.50ct Blue Kyanite, Round, SI

4.3 mm

$ 12.45

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1.27ct Red Tourmaline, Oval, Transparent

1.27ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 21.77

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41.43ct Multicolor Coral, Oval, Opaque

41.43ct Multicolor Coral, Oval, Opaque

37.4 x 25.7 mm

$ 60.82

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5.30ct Orange Moonstone, Oval, Translucent

5.30ct Orange Moonstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 11.67

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0.72ct Blue Kyanite, Oval, SI

0.72ct Blue Kyanite, Oval, SI

6.3 x 4.2 mm

$ 15.78

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3.94ct Multicolor Fire Agate, Trillion, Opaque

3.94ct Multicolor Fire Agate, Trillion, Opaque

12.2 x 9.6 mm

$ 33.62

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3.02ctw Yellow Citrine, Emerald Cut, VVS-VS
Citrine Product Video (556984)

3.02ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.98

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1.74ct Yellow Citrine, Emerald Cut, VVS-VS

1.74ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 13.86

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21.47ct Violet Charoite, Pear Shape, Opaque

21.47ct Violet Charoite, Pear Shape, Opaque

27.6 x 15.8 mm

$ 35.50

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1.26ctw Orange Zircon, Oval, VVS

1.26ctw Orange Zircon, Oval, VVS

5.2 x 4.1 mm

$ 31.37

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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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 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 -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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