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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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Untreated Gemstones Treatment

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16.58ctw Green Aventurine, Pear Shape, Translucent

16.58ctw Green Aventurine, Pear Shape, Translucent

20.5 x 12.2 mm

$ 36.34

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1.38ct Green Tourmaline, Emerald Cut, VS-SI

1.38ct Green Tourmaline, Emerald Cut, VS-SI

11.9 x 3.8 mm

$ 45.36

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3.47ct Orange Sunstone, Oval, Transparent

3.47ct Orange Sunstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 53.23

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1.16ct Orange Sunstone, Oval, Translucent

1.16ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.08

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3.08ct Red Almandine Garnet, Oval, VVS-VS

3.08ct Red Almandine Garnet, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 89.47

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7.47ctw Yellow Citrine, Pear Shape, VVS-VS

7.47ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 49.10

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14.30ct Violet Amethyst, Emerald Cut, VVS
Amethyst Product Video (713705)

14.30ct Violet Amethyst, Emerald Cut, VVS

18 x 13 mm (calibrated)

$ 99.70

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0.51ct Yellow Citrine, Cushion, Transparent

0.51ct Yellow Citrine, Cushion, Transparent

5 x 5 mm (calibrated)

$ 3.81

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3.53ctw Orange Moonstone, Cushion, Translucent

3.53ctw Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 7.03

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1.00ct Purple Spinel, Oval, VS

1.00ct Purple Spinel, Oval, VS

7 x 5 mm (calibrated)

$ 106.82

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14.62ctw Black Spinel, Round, Opaque

14.62ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 45.48

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10.26ct Brown Smoky Quartz, Marquise, Transparent

10.26ct Brown Smoky Quartz, Marquise, Transparent

19.7 x 12.7 mm

$ 39.14

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12.28ctw Multicolor Pietersite, Trillion, Opaque

12.28ctw Multicolor Pietersite, Trillion, Opaque

17 x 17 mm (calibrated)

$ 40.35

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0.97ct Blue Cavansite, Fancy, Opaque

0.97ct Blue Cavansite, Fancy, Opaque

7.6 x 7.3 mm

$ 5.64

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2.35ct Blue Chalcedony, Oval, Transparent

2.35ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.68

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6.83ct Green Actinolite Cat'S Eye, Oval, Translucent

6.83ct Green Actinolite Cat'S Eye, Oval, Translucent

13.6 x 11.1 mm

$ 47.62

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1.60ct Red Almandine Garnet, Baguette, VVS

1.60ct Red Almandine Garnet, Baguette, VVS

9 x 5 mm

$ 59.76

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28.79ctw Black Spinel, Fancy, Opaque

28.79ctw Black Spinel, Fancy, Opaque

18.1 x 11.7 mm

$ 134.63

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1.77ct Pink Morganite, Pear Shape, VVS-VS

1.77ct Pink Morganite, Pear Shape, VVS-VS

11.6 x 6.3 mm

$ 135.75

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16.77ctw Black Tourmaline, Oval, Opaque

16.77ctw Black Tourmaline, Oval, Opaque

13.7 x 11 mm

$ 83.51

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1.25ctw Green Demantoid Garnet, Oval, VVS-VS

1.25ctw Green Demantoid Garnet, Oval, VVS-VS

4.3 x 3.5 mm

$ 136.95

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1.47ct Green Sphene, Oval, Transparent

1.47ct Green Sphene, Oval, Transparent

6.5 x 6 mm

$ 7.32

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19.78ct Multicolor Labradorite, Round, Opaque

19.78ct Multicolor Labradorite, Round, Opaque

19 mm (calibrated)

$ 17.73

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2.46ct Yellow Cat'S Eye Apatite, Oval, Translucent

2.46ct Yellow Cat'S Eye Apatite, Oval, Translucent

9.2 x 6.6 mm

$ 18.87

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
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
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate
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