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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Yellow Untreated Gemstones
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1.84ct Yellow Citrine, Emerald Cut, VVS-VS

1.84ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 14.66

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2.23ctw Orange Sunstone, Oval, Translucent

2.23ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 17.10

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2.54ct White Rainbow Moonstone, Oval, Transparent

2.54ct White Rainbow Moonstone, Oval, Transparent

9 x 9 mm (calibrated)

$ 43.23

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9.98ct Green Prehnite, Fancy, Translucent

9.98ct Green Prehnite, Fancy, Translucent

16.7 x 12 mm

$ 16.40

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40.33ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

40.33ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

31.3 x 23.1 mm

$ 40.17

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1.59ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

1.59ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

8.1 x 5.4 mm

$ 46.50

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0.92ct Green Sphene, Oval, VS-SI

0.92ct Green Sphene, Oval, VS-SI

6.6 x 5.5 mm

$ 55.44

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34.00ct Gray Jadeite, Oval, Translucent

34.00ct Gray Jadeite, Oval, Translucent

28.9 x 23 mm

$ 55.88

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87.42ct Pink Rose Quartz, Square, Opaque

87.42ct Pink Rose Quartz, Square, Opaque

25.7 x 25.6 mm

$ 181.40

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85.94ct Blue Sodalite, Square, Opaque

85.94ct Blue Sodalite, Square, Opaque

27 x 27.1 mm

$ 71.33

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0.72ct Green Peridot, Oval, VVS-VS

0.72ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 10.04

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4.05ctw Brown Smoky Quartz, Round, VS

4.05ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 6.66

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0.73ct Yellow Citrine, Marquise, VS

0.73ct Yellow Citrine, Marquise, VS

9 x 5.1 mm

$ 5.82

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1.84ct Red Fire Opal, Oval, Transparent
Fire Opal Product Video (673701)

1.84ct Red Fire Opal, Oval, Transparent

10.6 x 7.9 mm

$ 64.14

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1.67ct Orange Zircon, Emerald Cut, VVS

1.67ct Orange Zircon, Emerald Cut, VVS

7.2 x 5.2 mm

$ 27.45

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6.33ctw White Rutile Quartz, Round, Translucent

6.33ctw White Rutile Quartz, Round, Translucent

9 mm (calibrated)

$ 13.88

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2.04ctw Orange Moonstone, Trillion, Translucent

2.04ctw Orange Moonstone, Trillion, Translucent

6.3 x 6.2 mm

$ 4.08

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2.37ctw Green Tsavorite Garnet, Round, VS-SI
Tsavorite Garnet Product Video (390056)

2.37ctw Green Tsavorite Garnet, Round, VS-SI

2.4 mm (calibrated)

$ 184.07

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1.67ct Green Tourmaline, Emerald Cut, VVS-VS

1.67ct Green Tourmaline, Emerald Cut, VVS-VS

13.9 x 3.6 mm

$ 43.92

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0.61ct Yellow Chrysoberyl, Round, VVS-VS

0.61ct Yellow Chrysoberyl, Round, VVS-VS

5 mm (calibrated)

$ 55.69

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27.96ctw Multicolor Jasper, Oval, Opaque

27.96ctw Multicolor Jasper, Oval, Opaque

26.5 x 15.4 mm

$ 16.43

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1.42ct Purple Spinel, Cushion, VS

1.42ct Purple Spinel, Cushion, VS

6.7 x 6 mm

$ 91.93

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3.88ct Yellow Citrine, Oval, VVS-VS

3.88ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 29.76

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3.89ctw Red Pyrope Garnet, Marquise, VVS-VS

3.89ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 21.31

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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

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

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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