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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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1.72ct Yellow Beryl, Trillion, VVS

1.72ct Yellow Beryl, Trillion, VVS

9 x 9 mm (calibrated)

$ 37.69

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3.59ctw Green Prehnite, Oval, Transparent

3.59ctw Green Prehnite, Oval, Transparent

7.9 x 6.9 mm

$ 19.67

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1.36ct Multicolor Opal, Pear Shape, Transparent

1.36ct Multicolor Opal, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 33.86

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0.44ct Yellow Citrine, Heart, VVS-VS

0.44ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.50

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1.48ctw Orange Fire Opal, Oval, Transparent

1.48ctw Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 27.02

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1.01ct Yellow Color-Change Diaspore, Cushion, VVS

1.01ct Yellow Color-Change Diaspore, Cushion, VVS

7.4 x 4.9 mm

$ 53.32

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17.78ct Brown Spessartite Garnet, Flower Cut, Translucent

17.78ct Brown Spessartite Garnet, Flower Cut, Translucent

15.3 x 14.1 mm

$ 16.37

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66.56ct Multicolor Jasper, Oval, Opaque

66.56ct Multicolor Jasper, Oval, Opaque

32.9 x 27.7 mm

$ 34.27

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0.67ct Pink Spinel, Cushion, VS

0.67ct Pink Spinel, Cushion, VS

5.7 x 4.4 mm

$ 38.93

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5.02ctw Red Pyrope Garnet, Pear Shape, VVS-VS

5.02ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 38.50

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3.43ct Yellow Citrine, Oval, VVS-VS
Citrine Product Video (534767)

3.43ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.55

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33.55ct White Rainbow Moonstone, Pear Shape, Translucent

33.55ct White Rainbow Moonstone, Pear Shape, Translucent

27.6 x 24.1 mm

$ 233.91

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1.09ctw Red Pyrope Garnet, Heart, VS

1.09ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 28.67

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2.02ct Green Tourmaline, Flower Cut, Translucent

2.02ct Green Tourmaline, Flower Cut, Translucent

12.4 x 7.4 mm

$ 22.13

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4.11ct White Topaz, Heart, VVS-VS

4.11ct White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 34.11

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3.73ct Yellow Citrine, Pear Shape, VVS-VS

3.73ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.41

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51.51ct Multicolor Jasper, Cushion, Opaque

51.51ct Multicolor Jasper, Cushion, Opaque

33 x 30.7 mm

$ 28.23

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3.87ct Yellow Rutile Quartz, Oval, Transparent

3.87ct Yellow Rutile Quartz, Oval, Transparent

12 x 8 mm (calibrated)

$ 8.84

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2.12ct Red Almandine Garnet, Oval, VVS-VS

2.12ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 79.18

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4.77ct Green Cat'S Eye Opal, Oval, Opaque

4.77ct Green Cat'S Eye Opal, Oval, Opaque

13.3 x 9.8 mm

$ 7.92

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87.47ct Green Amazonite, Square, Opaque

87.47ct Green Amazonite, Square, Opaque

25.6 x 25.4 mm

$ 50.82

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2.01ct Orange Hessonite Garnet, Cushion, SI

2.01ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 34.25

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0.63ct Yellow Citrine, Pear Shape, VVS-VS

0.63ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 3.14

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0.92ct Pink Malaya Garnet, Round, VS-SI

0.92ct Pink Malaya Garnet, Round, VS-SI

6 mm (calibrated)

$ 30.24

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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