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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: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
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41.79ct Multicolor Jasper, Fancy, Translucent

41.79ct Multicolor Jasper, Fancy, Translucent

41.8 x 25 mm

$ 32.97

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6.99ct Brown Rutile Quartz, Round, Translucent

6.99ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 14.62

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0.21ctw White Diamond, Round, VVS-VS
Diamond Product Video (565089)

0.21ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 381.55

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0.55ct Yellow Sphalerite, Fancy, SI

0.55ct Yellow Sphalerite, Fancy, SI

6.1 x 4.2 mm

$ 27.39

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9.89ct Brown Smoky Quartz, Round, VVS

9.89ct Brown Smoky Quartz, Round, VVS

15 mm (calibrated)

$ 39.88

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58.74ct Multicolor Jasper, Cushion, Opaque

58.74ct Multicolor Jasper, Cushion, Opaque

31.5 x 25 mm

$ 53.63

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58.60ct Black Nuummite, Fancy, Opaque

58.60ct Black Nuummite, Fancy, Opaque

38.6 x 32 mm

$ 211.22

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42.68ct Multicolor Jasper, Cushion, Opaque

42.68ct Multicolor Jasper, Cushion, Opaque

30 x 22 mm (calibrated)

$ 35.28

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10.19ctw Multicolor Ruby In Fuchsite, Marquise, Translucent
Ruby in Fuchsite Product Video (385555)

10.19ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

20.2 x 9.9 mm

$ 75.14

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9.89ct Green Tsavorite Garnet, Pear Shape, Translucent
Tsavorite Garnet Product Video (522842)

9.89ct Green Tsavorite Garnet, Pear Shape, Translucent

17.3 x 11.2 mm

$ 216.71

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11.09ct Multicolor Coral, Round, Translucent

11.09ct Multicolor Coral, Round, Translucent

17 mm (calibrated)

$ 24.30

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2.60ct Green Tourmaline, Emerald Cut, VVS

2.60ct Green Tourmaline, Emerald Cut, VVS

21.1 x 4 mm

$ 71.21

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2.34ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.34ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.3 x 6.7 mm

$ 43.44

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1.18ct Green Tsavorite Garnet, Pear Shape, SI
Tsavorite Garnet Product Video (415695)

1.18ct Green Tsavorite Garnet, Pear Shape, SI

8.8 x 5.2 mm

$ 787.44

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50.61ct Blue Larimar, Fancy, Opaque
Larimar Product Video (492449)

50.61ct Blue Larimar, Fancy, Opaque

30.1 x 26 mm

$ 499.06

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1.89ct Green Sphene, Pear Shape, VS
Sphene Product Video (381632)

1.89ct Green Sphene, Pear Shape, VS

9.5 x 6.9 mm

$ 155.76

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32.34ctw Multicolor Labradorite, Oval, Translucent

32.34ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 70.87

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9.06ct Green Prehnite, Round, Translucent

9.06ct Green Prehnite, Round, Translucent

14 mm (calibrated)

$ 44.67

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14.67ct Pink Rose Quartz, Emerald Cut, Transparent

14.67ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 80.37

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9.88ct Multicolor Ruby-Zoisite, Baguette, Opaque

9.88ct Multicolor Ruby-Zoisite, Baguette, Opaque

18.1 x 10 mm

$ 24.01

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6.71ct Yellow Color-Change Diaspore, Emerald Cut, VS
Color-Change Diaspore Product Video (391064)

6.71ct Yellow Color-Change Diaspore, Emerald Cut, VS

22.7 x 7.5 mm

$ 2,720.04

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0.97ct Yellow Color-Change Garnet, Cushion, VS-SI

0.97ct Yellow Color-Change Garnet, Cushion, VS-SI

6.8 x 4.2 mm

$ 86.09

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0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 272.54

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8.03ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385931)

8.03ct Yellow Apatite, Pear Shape, VS

17 x 11 mm

$ 424.06

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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

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 -> 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 -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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