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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
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.47ct Green Tourmaline, Emerald Cut, VVS

2.47ct Green Tourmaline, Emerald Cut, VVS

22.6 x 3.6 mm

$ 81.18

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2.86ctw Blue Kyanite, Oval, VS-SI

2.86ctw Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 62.67

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11.75ct Pink Rose Quartz, Emerald Cut, Transparent

11.75ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 64.37

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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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11.91ct Yellow Cat'S Eye Opal, Oval, Opaque
Cat's Eye Opal Product Video (484212)

11.91ct Yellow Cat'S Eye Opal, Oval, Opaque

15.5 x 13 mm

$ 59.31

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32.94ctw Multicolor Labradorite, Oval, Translucent

32.94ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 65.62

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12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque
Tiger's Eye Product Video (526454)

12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 12.58

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73.44ct Multicolor Agate, Oval, Opaque

73.44ct Multicolor Agate, Oval, Opaque

25.4 x 25 mm

$ 36.57

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1.61ct Purple Spinel, Pear Shape, VS
Spinel Product Video (382653)

1.61ct Purple Spinel, Pear Shape, VS

9.3 x 6.3 mm

$ 113.63

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35.05ctw Multicolor Fossil Coral, Cushion, Opaque

35.05ctw Multicolor Fossil Coral, Cushion, Opaque

18.6 x 14.3 mm

$ 76.80

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23.50ct Gray Hematite, Heart, Opaque

23.50ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 51.49

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41.62ct Multicolor Jasper, Pear Shape, Opaque

41.62ct Multicolor Jasper, Pear Shape, Opaque

38.2 x 33.5 mm

$ 45.60

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0.87ctw Green Demantoid Garnet, Oval, VS-SI
Demantoid Garnet Product Video (284163)

0.87ctw Green Demantoid Garnet, Oval, VS-SI

4.8 x 3.7 mm

$ 108.46

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5.60ct Green Amazonite, Marquise, Opaque

5.60ct Green Amazonite, Marquise, Opaque

20 x 10 mm (calibrated)

$ 11.20

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18.08ctw Green Aventurine, Pear Shape, Translucent

18.08ctw Green Aventurine, Pear Shape, Translucent

20.7 x 14.4 mm

$ 41.80

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9.45ct Turquoise Larimar, Pear Shape, Opaque

9.45ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 103.43

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19.00ct Green Maw-Sit-Sit, Round, Opaque

19.00ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 44.34

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16.47ctw Green Aventurine, Pear Shape, Translucent

16.47ctw Green Aventurine, Pear Shape, Translucent

21.6 x 14.4 mm

$ 38.08

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2.60ct Orange Hessonite Garnet, Cushion, SI

2.60ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 48.42

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1.14ct Pink Morganite, Pear Shape, VVS-VS
Morganite Product Video (478160)

1.14ct Pink Morganite, Pear Shape, VVS-VS

9.9 x 6.2 mm

$ 104.08

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2.51ct Yellow Golden Beryl, Oval, VVS

2.51ct Yellow Golden Beryl, Oval, VVS

10 x 8 mm (calibrated)

$ 68.76

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 254.36

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0.87ct Pink Malaya Garnet, Marquise, VS

0.87ct Pink Malaya Garnet, Marquise, VS

8.7 x 4.6 mm

$ 40.03

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39.03ct Multicolor Jasper, Pear Shape, Opaque

39.03ct Multicolor Jasper, Pear Shape, Opaque

33.5 x 33.2 mm

$ 64.13

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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

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

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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