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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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For Example: 8-9
Bi-color Untreated Gemstones
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5.30ctw Violet Amethyst, Fancy, VS

5.30ctw Violet Amethyst, Fancy, VS

9 x 4.6 mm

$ 29.03

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1.19ct Orange Sunstone, Oval, Translucent

1.19ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.30

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0.90ct Pink Morganite, Pear Shape, VVS-VS

0.90ct Pink Morganite, Pear Shape, VVS-VS

8.1 x 5.3 mm

$ 78.88

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0.47ct Blue Kyanite, Round, SI

0.47ct Blue Kyanite, Round, SI

4.2 mm

$ 11.70

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0.44ct Orange Clinohumite, Round, SI-I1

0.44ct Orange Clinohumite, Round, SI-I1

5 mm (calibrated)

$ 18.26

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11.65ctw White Rutile Quartz, Round, Transparent

11.65ctw White Rutile Quartz, Round, Transparent

12 mm (calibrated)

$ 25.53

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4.63ct Violet Amethyst, Pear Shape, VVS

4.63ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 30.44

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2.83ct Yellow Citrine, Pear Shape, VVS-VS

2.83ct Yellow Citrine, Pear Shape, VVS-VS

9 x 9 mm (calibrated)

$ 21.70

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5.63ct Multicolor Pietersite, Round, Opaque

5.63ct Multicolor Pietersite, Round, Opaque

13 mm (calibrated)

$ 13.29

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15.48ct Green Bloodstone, Pear Shape, Opaque

15.48ct Green Bloodstone, Pear Shape, Opaque

28.8 x 16.5 mm

$ 6.94

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1.15ct Green Sphene, Oval, Transparent

1.15ct Green Sphene, Oval, Transparent

6.2 x 5.6 mm

$ 5.73

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16.67ct Green Druzy Variscite, Fancy, Opaque

16.67ct Green Druzy Variscite, Fancy, Opaque

30.6 x 19.2 mm

$ 25.41

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18.37ct Violet Amethyst, Cushion, VVS-VS

18.37ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 128.08

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2.86ct White Opal, Oval, Transparent

2.86ct White Opal, Oval, Transparent

13.3 x 8.5 mm

$ 71.21

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0.76ct Green Sphene, Oval, Transparent

0.76ct Green Sphene, Oval, Transparent

5.8 x 4.8 mm

$ 3.78

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3.55ct Pink Strawberry Quartz, Oval, Transparent

3.55ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.63

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1.58ct Green Sphene, Oval, Transparent

1.58ct Green Sphene, Oval, Transparent

6.9 x 6.2 mm

$ 7.87

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2.07ct Orange Hessonite Garnet, Oval, VS

2.07ct Orange Hessonite Garnet, Oval, VS

8.4 x 7 mm

$ 37.17

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27.38ct Green Amazonite, Fancy, Opaque

27.38ct Green Amazonite, Fancy, Opaque

32.5 x 10.6 mm

$ 5.46

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1.33ctw Red Pyrope Garnet, Square, VS

1.33ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.20

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7.27ct Multicolor Labradorite, Pear Shape, Translucent

7.27ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 16.08

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10.14ct Green Prehnite, Fancy, Translucent

10.14ct Green Prehnite, Fancy, Translucent

16.9 x 11.8 mm

$ 16.67

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0.86ct Green Peridot, Oval, VS

0.86ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.99

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5.77ct Red Almandine Garnet, Oval, VVS-VS

5.77ct Red Almandine Garnet, Oval, VVS-VS

12.2 x 9.2 mm

$ 172.41

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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

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
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

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
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 -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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