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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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6.22ctw Violet Amethyst, Oval, Transparent

6.22ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 34.07

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2.51ct Orange Moonstone, Square, Translucent

2.51ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 5.03

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2.54ctw Red Pyrope Garnet, Square, VS

2.54ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.48

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2.44ct Orange Moonstone, Cushion, Translucent

2.44ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.86

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19.44ct Violet Charoite, Fancy, Opaque

19.44ct Violet Charoite, Fancy, Opaque

24.8 x 16.3 mm

$ 32.14

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2.91ct Bi-Color Ametrine, Emerald Cut, VS

2.91ct Bi-Color Ametrine, Emerald Cut, VS

10 x 8 mm (calibrated)

$ 30.53

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21.73ct Pink Kunzite, Emerald Cut, VVS-VS
Kunzite Product Video (710470)

21.73ct Pink Kunzite, Emerald Cut, VVS-VS

18 x 13 mm (calibrated)

$ 573.55

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7.82ct Multicolor Pietersite, Round, Opaque

7.82ct Multicolor Pietersite, Round, Opaque

15 mm (calibrated)

$ 18.92

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59.48ct Multicolor Jasper, Cushion, Opaque

59.48ct Multicolor Jasper, Cushion, Opaque

44.2 x 26.3 mm

$ 34.36

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2.20ctw Violet Amethyst, Marquise, VVS-VS

2.20ctw Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 14.61

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1.97ct Yellow Citrine, Round, VVS

1.97ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.74

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14.50ct Violet Amethyst, Round, VVS

14.50ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 115.54

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5.15ctw Orange Sunstone, Oval, Translucent

5.15ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 32.92

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7.41ct Yellow Rutile Quartz, Pear Shape, Transparent

7.41ct Yellow Rutile Quartz, Pear Shape, Transparent

14.8 x 10.8 mm

$ 20.14

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1.97ct Red Almandine Garnet, Oval, VS

1.97ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 73.58

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1.56ct Pink Tourmaline, Emerald Cut, VVS

1.56ct Pink Tourmaline, Emerald Cut, VVS

10.8 x 4.1 mm

$ 117.93

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22.91ct Gray Hematite, Heart, Opaque

22.91ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 50.20

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3.58ctw Brown Smoky Quartz, Round, VVS-VS

3.58ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 7.85

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2.93ct Orange Moonstone, Marquise, Translucent

2.93ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.83

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0.41ct Yellow Citrine, Heart, VVS-VS

0.41ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.27

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3.76ct Violet Amethyst, Pear Shape, VVS

3.76ct Violet Amethyst, Pear Shape, VVS

13.8 x 9.6 mm

$ 27.31

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49.07ctw Gray Hematite, Oval, Opaque

49.07ctw Gray Hematite, Oval, Opaque

21.3 x 16 mm

$ 47.85

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23.69ctw Brown Rutile Quartz, Sphere / Ball, Transparent

23.69ctw Brown Rutile Quartz, Sphere / Ball, Transparent

12 mm (calibrated)

$ 25.95

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5.22ct Brown Smoky Quartz, Round, Transparent

5.22ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 21.90

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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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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