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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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2.59ct Orange Moonstone, Marquise, Translucent

2.59ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.16

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8.34ctw Violet Amethyst, Oval, Transparent

8.34ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 45.68

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2.15ctw Orange Moonstone, Cushion, Translucent

2.15ctw Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 4.71

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1.76ctw Red Pyrope Garnet, Square, VS

1.76ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.50

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1.54ct Orange Citrine, Oval, VVS

1.54ct Orange Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 15.34

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1.34ct Orange Hessonite Garnet, Baguette, VS
Hessonite Garnet Product Video (555599)

1.34ct Orange Hessonite Garnet, Baguette, VS

7 x 5 mm (calibrated)

$ 29.37

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11.85ct Pink Rose Quartz, Emerald Cut, Transparent

11.85ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 64.92

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0.53ct Blue Kyanite, Round, SI

0.53ct Blue Kyanite, Round, SI

4.3 mm

$ 13.20

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1.59ct Red Tourmaline, Oval, Transparent

1.59ct Red Tourmaline, Oval, Transparent

8.2 x 6.3 mm

$ 27.25

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8.58ct White Rainbow Moonstone, Fancy, Transparent

8.58ct White Rainbow Moonstone, Fancy, Transparent

18.5 x 10.2 mm

$ 153.82

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2.37ct Yellow Beryl, Round, VVS

2.37ct Yellow Beryl, Round, VVS

9 mm (calibrated)

$ 51.93

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0.55ct White Rainbow Moonstone, Marquise, Transparent

0.55ct White Rainbow Moonstone, Marquise, Transparent

8 x 4 mm (calibrated)

$ 17.53

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13.81ctw Green Prehnite, Fancy, Transparent

13.81ctw Green Prehnite, Fancy, Transparent

17.5 x 11.8 mm

$ 21.65

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2.51ct Orange Sunstone, Oval, Transparent

2.51ct Orange Sunstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.12

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0.99ctw Red Pyrope Garnet, Square, VVS-VS

0.99ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.59

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0.67ct Purple Spinel, Oval, VVS-VS

0.67ct Purple Spinel, Oval, VVS-VS

5.7 x 5.1 mm

$ 55.61

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2.38ct Orange Moonstone, Cushion, Translucent

2.38ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.74

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0.43ct Multicolor Labradorite, Pear Shape, Translucent

0.43ct Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 0.95

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5.14ct Gray Jadeite, Oval, Translucent

5.14ct Gray Jadeite, Oval, Translucent

14.4 x 9.4 mm

$ 16.89

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0.58ct Yellow Zircon, Oval, VVS

0.58ct Yellow Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 8.67

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1.05ct Orange Sunstone, Oval, Translucent

1.05ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.10

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7.55ctw Multicolor Pietersite, Round, Opaque

7.55ctw Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 18.49

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3.06ct Yellow Rutile Quartz, Oval, Transparent

3.06ct Yellow Rutile Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 8.25

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2.34ctw Pink Strawberry Quartz, Oval, Translucent

2.34ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 30.77

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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 -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 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 -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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