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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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2.95ctw White Topaz, Cushion, VVS-VS

2.95ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.17

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1.40ct Yellow Citrine, Emerald Cut, VVS-VS

1.40ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 11.16

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2.83ctw White Rainbow Moonstone, Square, Transparent

2.83ctw White Rainbow Moonstone, Square, Transparent

3.1 x 3.1 mm

$ 80.62

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6.22ct Black Tourmaline, Emerald Cut, Opaque

6.22ct Black Tourmaline, Emerald Cut, Opaque

16.7 x 6.7 mm

$ 30.98

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3.64ct Multicolor Pietersite, Cushion, Opaque

3.64ct Multicolor Pietersite, Cushion, Opaque

12 x 10 mm (calibrated)

$ 8.81

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0.96ctw Red Pyrope Garnet, Square, VS

0.96ctw Red Pyrope Garnet, Square, VS

4.2 x 4.2 mm

$ 7.36

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1.57ctw Orange Moonstone, Trillion, Translucent

1.57ctw Orange Moonstone, Trillion, Translucent

6 x 6 mm (calibrated)

$ 3.15

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2.08ct Orange Hessonite Garnet, Oval, VS

2.08ct Orange Hessonite Garnet, Oval, VS

8.4 x 6.8 mm

$ 45.58

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5.52ct Gray Star Sapphire, Oval, Opaque

5.52ct Gray Star Sapphire, Oval, Opaque

9.5 x 8.5 mm

$ 211.67

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3.70ct Turquoise Grandidierite, Emerald Cut, SI

3.70ct Turquoise Grandidierite, Emerald Cut, SI

11.2 x 8.3 mm

$ 162.15

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1.58ct Multicolor Opal, Pear Shape, Translucent

1.58ct Multicolor Opal, Pear Shape, Translucent

9.9 x 7.6 mm

$ 34.62

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2.04ctw Green Demantoid Garnet, Oval, VS-SI
Demantoid Garnet Product Video (498894)

2.04ctw Green Demantoid Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 223.50

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10.53ct White Rainbow Moonstone, Marquise, Transparent

10.53ct White Rainbow Moonstone, Marquise, Transparent

25.3 x 9.9 mm

$ 157.32

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3.26ctw Yellow Citrine, Square, VS

3.26ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 22.65

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2.85ctw Blue Kyanite, Oval, SI

2.85ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 56.77

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0.64ct Orange Zircon, Oval, VVS

0.64ct Orange Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 9.56

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2.27ct Orange Hessonite Garnet, Cushion, VS-SI

2.27ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 42.84

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0.84ct Orange Zircon, Oval, VVS

0.84ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 12.55

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0.38ct Blue Kyanite, Round, VS-SI

0.38ct Blue Kyanite, Round, VS-SI

4.3 mm

$ 9.46

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1.29ct Orange Hessonite Garnet, Cushion, VS-SI

1.29ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 23.12

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 16.28

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1.98ctw Red Pyrope Garnet, Oval, VVS-VS

1.98ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 17.16

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2.08ct Green Sphene, Oval, Transparent

2.08ct Green Sphene, Oval, Transparent

7.9 x 6.9 mm

$ 10.36

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2.19ct Pink Tourmaline, Emerald Cut, VS-SI

2.19ct Pink Tourmaline, Emerald Cut, VS-SI

12.4 x 4.8 mm

$ 107.97

View Gem
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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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 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

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
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