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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

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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13.59ct Brown Smoky Quartz, Emerald Cut, VVS
Smoky Quartz Product Video (599537)

13.59ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 37.23

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0.17ct Yellow Diamond, Round, VS
Diamond Product Video (543902)

0.17ct Yellow Diamond, Round, VS

3.5 mm (calibrated)

$ 306.68

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236.30ct Pink Star Rose Quartz, Oval, Transparent/Translucent
Star Rose Quartz Product Video (344438)

236.30ct Pink Star Rose Quartz, Oval, Transparent/Translucent

38.2 x 36.2 mm

$ 539.36

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1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

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3.26ct Pink Tourmaline, Emerald Cut, SI
Tourmaline Product Video (544803)

3.26ct Pink Tourmaline, Emerald Cut, SI

9.8 x 6.7 mm

$ 205.37

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43.39ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (528821)

43.39ct Pink Rose Quartz, Pear Shape, Transparent

30 x 20.2 mm

$ 79.23

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0.31ct Brown Diamond, Round, VS
Diamond Product Video (564603)

0.31ct Brown Diamond, Round, VS

4.5 mm (calibrated)

$ 514.48

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21.39ct Multicolor Boulder Opal, Cushion, Opaque
Boulder Opal Product Video (626298)

21.39ct Multicolor Boulder Opal, Cushion, Opaque

16 x 16 mm (calibrated)

$ 164.04

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19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

23.8 x 17.9 mm

$ 50.58

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56.50ct Violet Charoite, Oval, Opaque
Charoite Product Video (567268)

56.50ct Violet Charoite, Oval, Opaque

45.2 x 27 mm

$ 105.86

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5.55ct Orange Imperial Topaz, Pear Shape, VVS
Imperial Topaz Product Video (346661)

5.55ct Orange Imperial Topaz, Pear Shape, VVS

16.5 x 7.1 mm

$ 3,095.57

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13.54ctw Black Spinel, Round, Opaque

13.54ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 44.50

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1.22ct Green Chrysoberyl, Pear Shape, VVS

1.22ct Green Chrysoberyl, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 142.18

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9.27ct Pink Morganite, Trillion, Translucent

9.27ct Pink Morganite, Trillion, Translucent

14 x 14 mm (calibrated)

$ 101.56

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33.90ct Turquoise Chrysocolla, Oval, Opaque

33.90ct Turquoise Chrysocolla, Oval, Opaque

33.1 x 19.2 mm

$ 57.73

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0.16ctw White Diamond, Round, VVS-VS

0.16ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 242.24

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11.09ct Purple Kunzite, Trillion, VS
Kunzite Product Video (409216)

11.09ct Purple Kunzite, Trillion, VS

16.7 x 13 mm

$ 313.23

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19.70ct Blue Chalcedony, Cushion, Opaque

19.70ct Blue Chalcedony, Cushion, Opaque

23.3 x 17.3 mm

$ 49.05

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22.74ct White Howlite, Sphere / Ball, Opaque

22.74ct White Howlite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 11.77

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0.84ct Multicolor Chocolate Opal, Round, Translucent

0.84ct Multicolor Chocolate Opal, Round, Translucent

8 mm (calibrated)

$ 27.61

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6.82ct Multicolor Fire Agate, Fancy, Translucent

6.82ct Multicolor Fire Agate, Fancy, Translucent

12.7 x 11.4 mm

$ 53.49

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0.73ct Yellow Color-Change Garnet, Emerald Cut, VVS

0.73ct Yellow Color-Change Garnet, Emerald Cut, VVS

7.1 x 3.5 mm

$ 79.18

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13.66ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (693497)

13.66ct Purple Kunzite, Pear Shape, VVS-VS

16.9 x 10.2 mm

$ 375.92

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13.13ct Black Tourmaline, Round, Opaque

13.13ct Black Tourmaline, Round, Opaque

14 mm (calibrated)

$ 54.49

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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

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
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Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
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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
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