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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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21.99ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

21.99ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

29 x 19.9 mm

$ 21.90

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1.01ct Yellow Color-Change Diaspore, Cushion, VVS

1.01ct Yellow Color-Change Diaspore, Cushion, VVS

8.7 x 4.1 mm

$ 35.41

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100.52ct Blue Sodalite, Square, Opaque

100.52ct Blue Sodalite, Square, Opaque

27.8 x 27.4 mm

$ 83.43

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1.17ct Green Sphene, Oval, Transparent

1.17ct Green Sphene, Oval, Transparent

6.7 x 5.6 mm

$ 6.42

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0.28ct Green Kornerupine, Baguette, VVS

0.28ct Green Kornerupine, Baguette, VVS

5.5 x 3.1 mm

$ 23.99

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7.45ct Violet Amethyst, Marquise, VVS-VS

7.45ct Violet Amethyst, Marquise, VVS-VS

18 x 9.4 mm

$ 57.14

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1.39ctw Multicolor Opal, Oval, Translucent
Opal Product Video (548525)

1.39ctw Multicolor Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 346.11

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3.05ctw White Topaz, Cushion, VVS-VS

3.05ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.72

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6.97ctw Pink Strawberry Quartz, Oval, Transparent

6.97ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 54.45

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2.28ct Yellow Citrine, Trillion, VVS-VS

2.28ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 9.99

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15.76ct Violet Amethyst, Flower Cut, Translucent

15.76ct Violet Amethyst, Flower Cut, Translucent

16 x 16.7 mm

$ 51.80

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1.99ct Orange Zircon, Oval, VVS

1.99ct Orange Zircon, Oval, VVS

8 x 6 mm (calibrated)

$ 43.49

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13.55ct Multicolor Cinnabar, Cushion, Opaque

13.55ct Multicolor Cinnabar, Cushion, Opaque

18 x 18 mm (calibrated)

$ 15.86

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5.37ct Pink Morganite, Oval, Translucent

5.37ct Pink Morganite, Oval, Translucent

12 x 10 mm (calibrated)

$ 53.49

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67.41ct Multicolor Jasper, Oval, Opaque

67.41ct Multicolor Jasper, Oval, Opaque

46.5 x 29 mm

$ 38.94

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0.54ct Blue Kyanite, Round, SI

0.54ct Blue Kyanite, Round, SI

4.3 mm

$ 13.45

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1.99ct Orange Hessonite Garnet, Oval, VS

1.99ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.7 mm

$ 34.73

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18.43ctw Green Amazonite, Marquise, Opaque

18.43ctw Green Amazonite, Marquise, Opaque

20 x 10.3 mm

$ 14.68

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5.06ct Multicolor Pietersite, Oval, Opaque

5.06ct Multicolor Pietersite, Oval, Opaque

19.9 x 10.9 mm

$ 12.25

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2.08ct Orange Hessonite Garnet, Cushion, VS-SI

2.08ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 35.42

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1.13ctw Green Peridot, Marquise, VS

1.13ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 10.13

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2.10ct White Rainbow Moonstone, Oval, VS

2.10ct White Rainbow Moonstone, Oval, VS

8.1 x 7.2 mm

$ 219.24

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2.31ctw Green Demantoid Garnet, Oval, VS-SI
Demantoid Garnet Product Video (498892)

2.31ctw Green Demantoid Garnet, Oval, VS-SI

5.2 x 4.2 mm

$ 253.08

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0.88ctw Red Pyrope Garnet, Square, VVS-VS

0.88ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.76

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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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
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

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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