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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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1.59ct Red Almandine Garnet, Baguette, VVS

1.59ct Red Almandine Garnet, Baguette, VVS

9.9 x 5 mm

$ 59.39

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1.46ct Green Tourmaline, Emerald Cut, VVS-VS

1.46ct Green Tourmaline, Emerald Cut, VVS-VS

15.6 x 3.4 mm

$ 44.68

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27.47ct Gray Obsidian, Oval, Opaque

27.47ct Gray Obsidian, Oval, Opaque

30.5 x 21 mm

$ 21.67

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21.31ct Green Maw-Sit-Sit, Round, Opaque

21.31ct Green Maw-Sit-Sit, Round, Opaque

17 mm (calibrated)

$ 70.04

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2.67ctw Green Peridot, Round, VVS-VS

2.67ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 43.88

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13.86ct Bi-Color Ametrine, Pear Shape, VS

13.86ct Bi-Color Ametrine, Pear Shape, VS

17 x 17 mm (calibrated)

$ 106.29

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2.33ct Yellow Citrine, Oval, Transparent

2.33ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 16.24

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1.13ct Yellow Citrine, Round, VVS-VS

1.13ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 9.01

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0.96ctw Green Peridot, Pear Shape, VVS-VS

0.96ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.42

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0.86ct Blue Kyanite, Round, SI

0.86ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 21.41

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13.78ctw Multicolor Jasper, Pear Shape, Opaque

13.78ctw Multicolor Jasper, Pear Shape, Opaque

23.6 x 13.9 mm

$ 19.26

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0.97ct Brown Color-Change Garnet, Cushion, VS

0.97ct Brown Color-Change Garnet, Cushion, VS

7 x 5 mm (calibrated)

$ 77.49

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7.87ct Gray Jadeite, Oval, Translucent

7.87ct Gray Jadeite, Oval, Translucent

16.1 x 13 mm

$ 23.51

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6.86ct Red Almandine Garnet, Oval, VVS-VS
Almandine Garnet Product Video (732555)

6.86ct Red Almandine Garnet, Oval, VVS-VS

12.4 x 9.3 mm

$ 204.98

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0.86ctw Blue Kyanite, Round, VS-SI

0.86ctw Blue Kyanite, Round, VS-SI

4.2 mm

$ 21.41

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27.95ct Green Jadeite, Fancy, Translucent

27.95ct Green Jadeite, Fancy, Translucent

38.9 x 15 mm

$ 50.84

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11.08ct Multicolor Pietersite, Pear Shape, Opaque

11.08ct Multicolor Pietersite, Pear Shape, Opaque

22.4 x 13.7 mm

$ 36.79

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1.79ct Green Tourmaline, Emerald Cut, VVS-VS

1.79ct Green Tourmaline, Emerald Cut, VVS-VS

22.4 x 3.2 mm

$ 58.83

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2.99ctw Orange Hessonite Garnet, Emerald Cut, VS

2.99ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 58.96

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22.50ct Bi-Color Ametrine, Pear Shape, VVS

22.50ct Bi-Color Ametrine, Pear Shape, VVS

26.4 x 16 mm

$ 164.67

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0.61ct Yellow Color-Change Garnet, Emerald Cut, VVS

0.61ct Yellow Color-Change Garnet, Emerald Cut, VVS

7 x 3.5 mm

$ 66.17

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1.35ct Orange Hessonite Garnet, Oval, VS-SI

1.35ct Orange Hessonite Garnet, Oval, VS-SI

7.4 x 6 mm

$ 26.89

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4.38ct Violet Amethyst, Round, VVS-VS

4.38ct Violet Amethyst, Round, VVS-VS

11 mm (calibrated)

$ 24.00

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6.31ct Yellow Cat'S Eye Opal, Oval, Opaque

6.31ct Yellow Cat'S Eye Opal, Oval, Opaque

14 x 10 mm (calibrated)

$ 20.73

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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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky 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
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Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate
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