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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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Yellow Untreated Gemstones
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9.02ct Brown Star Moonstone, Round, Translucent

13 mm (calibrated)

$ 29.65

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7.65ct Violet Amethyst, Fancy, Transparent

14 x 12 mm (calibrated)

$ 45.72

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6.41ct Turquoise Grandidierite, Oval, Translucent

14 x 12 mm (calibrated)

$ 1,053.42

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2.17ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

5.9 x 3.8 mm

$ 16.64

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3.21ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 24.62

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1.45ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 22.15

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11.95ctw Multicolor Pietersite, Fancy, Opaque

25.7 x 12.2 mm

$ 52.77

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2.33ct Yellow Citrine, Oval, VVS

14 x 7 mm

$ 16.24

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2.09ct Red Pyrope Garnet, Square, VS

7 x 7 mm (calibrated)

$ 16.03

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1.73ct Multicolor Opal, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 48.01

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1.59ct Yellow Citrine, Oval, VS

9.5 x 7.5 mm

$ 12.19

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0.91ctw Red Pyrope Garnet, Square, VS

4.2 x 4.1 mm

$ 5.98

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2.19ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7 mm

$ 37.89

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2.15ct Multicolor Labradorite, Baguette, Translucent

8 x 6 mm (calibrated)

$ 4.71

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16.83ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 117.34

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7.54ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 20.48

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12.21ct Multicolor Rainbow Pyrite, Fancy, Opaque

25.4 x 12.2 mm

$ 36.49

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0.49ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 12.20

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5.33ct Multicolor Rainbow Pyrite, Fancy, Opaque

15.5 x 10.4 mm

$ 15.93

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3.40ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 26.08

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4.42ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.21

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14.10ctw Brown Rutile Quartz, Sphere / Ball, Transparent

10 mm (calibrated)

$ 22.39

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10.77ct Green Prehnite, Fancy, Transparent

20 x 14 mm

$ 14.99

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12.54ct Multicolor Labradorite, Round, Translucent

16 mm (calibrated)

$ 26.98

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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
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
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