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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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17.26ct Multicolor Pietersite, Cushion, Opaque

17.26ct Multicolor Pietersite, Cushion, Opaque

27.8 x 10.3 mm

$ 65.12

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2.63ctw Red Pyrope Garnet, Square, VS

2.63ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 20.17

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3.34ct Yellow Citrine, Cushion, VVS-VS

3.34ct Yellow Citrine, Cushion, VVS-VS

11 x 7.7 mm

$ 25.61

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5.04ctw Multicolor Labradorite, Pear Shape, Transparent/Translucent

5.04ctw Multicolor Labradorite, Pear Shape, Transparent/Translucent

10 x 7 mm (calibrated)

$ 11.15

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4.36ct Black Star Diopside, Oval, Opaque

4.36ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 18.09

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13.69ct Green Bloodstone, Oval, Opaque

13.69ct Green Bloodstone, Oval, Opaque

14.7 x 12.4 mm

$ 30.82

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11.12ct Brown Tiger'S Eye, Baguette, Opaque

11.12ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 11.07

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7.23ct Pink Morganite, Pear Shape, Transparent

7.23ct Pink Morganite, Pear Shape, Transparent

17 x 11.1 mm

$ 79.22

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7.80ct Yellow Citrine, Emerald Cut, VVS-VS

7.80ct Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 59.82

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1.32ct Yellow Citrine, Emerald Cut, VS

1.32ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 9.20

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0.91ct Orange Hessonite Garnet, Oval, VS-SI

0.91ct Orange Hessonite Garnet, Oval, VS-SI

6.9 x 5.2 mm

$ 18.13

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13.81ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450375)

13.81ct Blue Aquamarine, Emerald Cut, VVS

18.4 x 10.3 mm

$ 3,026.05

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2.06ctw Red Pyrope Garnet, Emerald Cut, VS

2.06ctw Red Pyrope Garnet, Emerald Cut, VS

5.8 x 3.8 mm

$ 15.79

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0.86ct Orange Hessonite Garnet, Emerald Cut, VS-SI

0.86ct Orange Hessonite Garnet, Emerald Cut, VS-SI

5.8 x 4.8 mm

$ 12.79

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6.23ct White Topaz, Cushion, VS

6.23ct White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 41.37

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1.13ct Green Tourmaline, Oval, Transparent

1.13ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 20.63

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0.08ctw Black Diamond, Round, Opaque

0.08ctw Black Diamond, Round, Opaque

2 mm (calibrated)

$ 63.74

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4.60ct Pink Kunzite, Cushion, VVS-VS

4.60ct Pink Kunzite, Cushion, VVS-VS

10 x 7 mm (calibrated)

$ 121.41

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7.91ct Multicolor Rainbow Pyrite, Baguette, Opaque

7.91ct Multicolor Rainbow Pyrite, Baguette, Opaque

17.5 x 10 mm

$ 20.41

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4.27ct Pink Strawberry Quartz, Oval, Translucent

4.27ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 51.04

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0.91ct Orange Morganite, Oval, VS

0.91ct Orange Morganite, Oval, VS

7.9 x 5.7 mm

$ 40.79

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1.41ctw Red Pyrope Garnet, Square, VS

1.41ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.81

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2.30ct Yellow Citrine, Cushion, VVS-VS

2.30ct Yellow Citrine, Cushion, VVS-VS

11.7 x 7.1 mm

$ 17.64

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1.67ct Green Tourmaline, Oval, VVS

1.67ct Green Tourmaline, Oval, VVS

7.4 x 5.8 mm

$ 194.05

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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

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

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 -> 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 -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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