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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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12.62ct Multicolor Boulder Opal, Cushion, Opaque

14 x 14 mm (calibrated)

$ 62.85

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4.50ct Black Star Diopside, Round, Opaque

9 mm (calibrated)

$ 18.68

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1.00ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4.4 mm

$ 207.50

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10.28ctw Multicolor Pietersite, Pear Shape, Opaque

18 x 14 mm

$ 24.06

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21.68ct Gray Hematite, Emerald Cut, Opaque

20.5 x 12.2 mm

$ 19.95

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65.58ct Violet Amethyst, Oval, VVS

30 x 22 mm (calibrated)

$ 491.19

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2.78ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 21.32

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1.57ct Violet Amethyst, Marquise, VS

12 x 6.1 mm

$ 10.32

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5.84ct White Topaz, Cushion, VVS-VS

12 x 10 mm (calibrated)

$ 38.78

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10.75ct Multicolor Coral, Oval, Translucent

16.8 x 12.7 mm

$ 33.57

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14.76ctw Multicolor Jasper, Pear Shape, Opaque

18.8 x 14.4 mm

$ 8.37

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0.96ct Orange Zircon, Oval, VVS

5.8 x 4.9 mm

$ 14.34

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1.15ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 28.64

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2.44ct Yellow Citrine, Flower Cut, Transparent

9 x 9 mm (calibrated)

$ 18.72

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6.24ct Yellow Apatite, Oval, VS

11 x 9.7 mm

$ 258.96

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0.38ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.03

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1.53ct Violet Spinel, Cushion, VS

6.7 x 5.9 mm

$ 262.28

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144.19ct White Dendritic Agate, Oval, Opaque

62.4 x 41.6 mm

$ 71.81

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17.13ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.4 x 11.3 mm

$ 18.77

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0.82ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.28

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0.80ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 19.92

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1.33ctw Orange Hessonite Garnet, Square, VS

3.4 x 3.4 mm

$ 28.29

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1.92ctw Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 12.75

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1.64ct Green Tourmaline, Cushion, VVS

7.2 x 6.3 mm

$ 190.57

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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

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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