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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
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 4.5 mm

$ 29.71

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0.32ct Pink Morganite, Round, VS

0.32ct Pink Morganite, Round, VS

4.7 mm

$ 13.28

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1.07ct Orange Hessonite Garnet, Round, VS

1.07ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 16.34

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1.78ct Green Tourmaline, Emerald Cut, VS

1.78ct Green Tourmaline, Emerald Cut, VS

17.1 x 3.5 mm

$ 46.80

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1.27ct Multicolor Opal, Oval, Translucent

1.27ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 55.66

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2.38ctw Green Peridot, Emerald Cut, VVS-VS

2.38ctw Green Peridot, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 65.19

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9.85ctw Yellow Citrine, Round, Transparent
Citrine Product Video (608153)

9.85ctw Yellow Citrine, Round, Transparent

12 mm (calibrated)

$ 75.55

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10.49ct Violet Amethyst, Round, VVS-VS

10.49ct Violet Amethyst, Round, VVS-VS

15 mm (calibrated)

$ 73.14

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4.32ct Green Jade, Oval, Opaque

4.32ct Green Jade, Oval, Opaque

11.5 x 10.2 mm

$ 8.61

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3.14ctw Orange Sunstone, Oval, Translucent

3.14ctw Orange Sunstone, Oval, Translucent

9 x 7 mm (calibrated)

$ 18.77

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6.55ctw Green Prehnite, Pear Shape, Transparent

6.55ctw Green Prehnite, Pear Shape, Transparent

11.7 x 7.5 mm

$ 35.89

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1.73ct Yellow Citrine, Round, VVS

1.73ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.79

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22.71ct Gray Hematite, Heart, Opaque

22.71ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 49.76

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1.49ctw Green Peridot, Oval, VS

1.49ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 20.77

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22.96ctw Multicolor Labradorite, Oval, Translucent

22.96ctw Multicolor Labradorite, Oval, Translucent

22.1 x 16.2 mm

$ 45.73

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3.20ct Yellow Citrine, Emerald Cut, VVS-VS

3.20ct Yellow Citrine, Emerald Cut, VVS-VS

10.7 x 8.6 mm

$ 24.54

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19.13ct Violet Amethyst, Emerald Cut, VS

19.13ct Violet Amethyst, Emerald Cut, VS

18.2 x 14.1 mm

$ 133.37

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4.40ctw Pink Rose Quartz, Emerald Cut, Transparent

4.40ctw Pink Rose Quartz, Emerald Cut, Transparent

8.5 x 8.5 mm

$ 24.10

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1.60ct Red Pyrope Garnet, Fancy, VS

1.60ct Red Pyrope Garnet, Fancy, VS

9.1 x 3.6 mm

$ 19.16

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2.32ct Purple Rhodolite Garnet, Emerald Cut, VS
Rhodolite Garnet Product Video (745634)

2.32ct Purple Rhodolite Garnet, Emerald Cut, VS

7.9 x 6.3 mm

$ 134.79

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1.28ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.28ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5.2 mm

$ 4.00

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20.97ct Black Obsidian, Oval, Opaque

20.97ct Black Obsidian, Oval, Opaque

33.5 x 20.9 mm

$ 15.67

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28.42ct Gray Hematite, Baguette, Opaque

28.42ct Gray Hematite, Baguette, Opaque

22.5 x 15.7 mm

$ 25.19

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1.44ct Green Tourmaline, Emerald Cut, VVS-VS

1.44ct Green Tourmaline, Emerald Cut, VVS-VS

16 x 3.2 mm

$ 48.60

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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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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