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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
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
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113.40ct Green Bloodstone, Square, Opaque

113.40ct Green Bloodstone, Square, Opaque

31.1 x 30.5 mm

$ 39.53

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2.00ct Brown Tiger'S Eye, Pear Shape, Opaque

2.00ct Brown Tiger'S Eye, Pear Shape, Opaque

8 x 8 mm (calibrated)

$ 2.59

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1.56ctw Multicolor Andalusite, Oval, VS

1.56ctw Multicolor Andalusite, Oval, VS

5.1 x 3.1 mm

$ 83.35

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6.93ct Green Prehnite, Cushion, Translucent

6.93ct Green Prehnite, Cushion, Translucent

12 x 12 mm (calibrated)

$ 34.16

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1.97ct Brown Rutile Quartz, Round, Translucent
Rutile Quartz Product Video (503694)

1.97ct Brown Rutile Quartz, Round, Translucent

8 mm (calibrated)

$ 4.77

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19.07ct White Howlite, Pear Shape, Opaque

19.07ct White Howlite, Pear Shape, Opaque

26.1 x 16.4 mm

$ 8.92

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2.04ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458679)

2.04ctw Green Demantoid Garnet, Oval, VS

4.9 x 4.1 mm

$ 223.50

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24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 15.26

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2.20ct Green Peridot, Oval, VS
Peridot Product Video (438077)

2.20ct Green Peridot, Oval, VS

8.5 x 6.8 mm

$ 76.69

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183.06ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (484087)

183.06ct Multicolor Ruby-Zoisite, Oval, Opaque

55.1 x 41.6 mm

$ 300.84

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13.10ctw Green Amazonite, Round, Opaque

13.10ctw Green Amazonite, Round, Opaque

9 mm (calibrated)

$ 10.44

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0.85ctw Green Peridot, Pear Shape, VVS-VS

0.85ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.45

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0.70ct Orange Sphalerite, Oval, SI-I1

0.70ct Orange Sphalerite, Oval, SI-I1

5.4 x 4.4 mm

$ 34.86

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8.87ctw Pink Strawberry Quartz, Oval, Transparent

8.87ctw Pink Strawberry Quartz, Oval, Transparent

11.1 x 9.9 mm

$ 46.82

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3.01ct Green Tourmaline, Emerald Cut, VS
Tourmaline Product Video (347663)

3.01ct Green Tourmaline, Emerald Cut, VS

22.4 x 4 mm

$ 148.40

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2.49ct Red Tourmaline, Pear Shape, Translucent

2.49ct Red Tourmaline, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 62.00

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7.30ct Yellow Rutile Quartz, Pear Shape, Transparent

7.30ct Yellow Rutile Quartz, Pear Shape, Transparent

15.1 x 11.1 mm

$ 19.83

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1.69ct Pink Morganite, Oval, VS

1.69ct Pink Morganite, Oval, VS

9 x 7 mm (calibrated)

$ 117.83

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7.49ct Violet Amethyst, Round, VS

7.49ct Violet Amethyst, Round, VS

13 mm (calibrated)

$ 49.24

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0.61ct Pink Spinel, Cushion, SI-I1
Spinel Product Video (691805)

0.61ct Pink Spinel, Cushion, SI-I1

4.8 x 4 mm

$ 415.00

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2.44ct Brown Tiger'S Eye, Round, Opaque

2.44ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 2.03

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1.24ct Yellow Sphalerite, Round, SI-I1

1.24ct Yellow Sphalerite, Round, SI-I1

6 mm (calibrated)

$ 61.75

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3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 70.21

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23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (382735)

23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent

19.5 x 15.6 mm

$ 405.94

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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!

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

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Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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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
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