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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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377.29ct Yellow Citrine, Oval, IF

61.6 x 37 mm

$ 3,131.51

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6.78ct Violet Amethyst, Pear Shape, Transparent

14 x 12 mm (calibrated)

$ 40.52

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44.41ct Red Strawberry Quartz, Fancy, Opaque

39 x 12.4 mm

$ 4.42

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4.30ct Turquoise Fluorite, Pear Shape, Transparent

12.7 x 8.4 mm

$ 17.65

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4.09ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 22.23

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13.78ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 109.80

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1.34ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.6 mm

$ 146.81

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0.72ct Multicolor Opal, Pear Shape, Translucent

8 x 6 mm (calibrated)

$ 17.99

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0.94ct Brown Color-Change Garnet, Oval, VS

5.8 x 4.9 mm

$ 75.10

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1.57ct Green Sphene, Oval, Transparent

7.3 x 6.4 mm

$ 7.82

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4.27ctw Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 9.99

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12.58ctw Multicolor Jasper, Pear Shape, Opaque

19 x 12.5 mm

$ 7.14

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8.87ct Multicolor Agate, Oval, Opaque

11.7 x 11.2 mm

$ 15.02

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3.30ctw Green Kornerupine, Oval, VVS-VS

7.2 x 5.4 mm

$ 108.46

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4.17ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.07

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5.31ctw Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 37.02

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2.02ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 10.42

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24.75ct Multicolor Chrysocolla, Oval, Opaque

35.6 x 17.8 mm

$ 42.15

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0.73ct Green Tourmaline, Emerald Cut, VVS

10 x 3.2 mm

$ 18.18

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8.17ctw Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 65.10

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15.28ct Black Tourmaline, Emerald Cut, Opaque

15.9 x 13.7 mm

$ 76.09

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2.00ct Pink Tourmaline, Emerald Cut, VVS

11.1 x 4.6 mm

$ 151.19

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2.37ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 88.52

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9.41ct Brown Smoky Quartz, Round, VS

14 mm (calibrated)

$ 18.44

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
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Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
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