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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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19.58ct Purple Ruby-Zoisite, Flower Cut, Opaque

19.58ct Purple Ruby-Zoisite, Flower Cut, Opaque

14.8 x 14.1 mm

$ 23.80

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30.49ct White Howlite, Oval, Opaque

30.49ct White Howlite, Oval, Opaque

31.6 x 22.6 mm

$ 15.19

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12.29ctw Green Aventurine, Trillion, Translucent

12.29ctw Green Aventurine, Trillion, Translucent

17.8 x 11.7 mm

$ 28.40

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30.55ctw Multicolor Fossil Coral, Cushion, Opaque

30.55ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 16 mm (calibrated)

$ 39.50

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5.53ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.53ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13.1 x 10.1 mm

$ 24.24

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2.04ct Multicolor Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (744060)

2.04ct Multicolor Tourmaline, Emerald Cut, VVS

8.4 x 5.9 mm

$ 457.16

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8.06ctw Pink Strawberry Quartz, Oval, Transparent

8.06ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 123.62

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3.86ctw Orange Moonstone, Trillion, Translucent

3.86ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.69

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2.40ct Green Prehnite, Oval, Transparent

2.40ct Green Prehnite, Oval, Transparent

7.8 x 7.2 mm

$ 12.91

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1.29ct Green Tourmaline, Round, Transparent

1.29ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 22.11

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4.35ctw Yellow Citrine, Oval, VVS-VS

4.35ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.84

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1.91ct Orange Hessonite Garnet, Cushion, VS-SI

1.91ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 28.47

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1.84ct Orange Moonstone, Cushion, Translucent

1.84ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 3.67

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11.03ct Brown Smoky Quartz, Emerald Cut, VVS

11.03ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 21.62

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11.70ct Turquoise Chrysocolla, Oval, Opaque

11.70ct Turquoise Chrysocolla, Oval, Opaque

19.7 x 13 mm

$ 16.03

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0.84ct Yellow Citrine, Marquise, VS

0.84ct Yellow Citrine, Marquise, VS

9.1 x 5 mm

$ 6.69

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0.85ct Green Peridot, Oval, VVS-VS

0.85ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 11.85

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1.52ct Multicolor Opal, Oval, Transparent

1.52ct Multicolor Opal, Oval, Transparent

11.1 x 8.2 mm

$ 37.85

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21.82ct Violet Amethyst, Emerald Cut, VVS

21.82ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 152.13

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14.56ctw Green Amazonite, Marquise, Opaque

14.56ctw Green Amazonite, Marquise, Opaque

18.3 x 9.2 mm

$ 11.60

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1.07ct Yellow Citrine, Square, VS

1.07ct Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 7.46

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1.07ct Purple Spinel, Pear Shape, VVS-VS

1.07ct Purple Spinel, Pear Shape, VVS-VS

7.6 x 5.2 mm

$ 118.92

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1.47ct White Sillimanite Cat'S Eye, Oval, Transparent

1.47ct White Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.5 mm

$ 4.83

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7.40ct Yellow Citrine, Emerald Cut, VVS
Citrine Product Video (500843)

7.40ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 47.59

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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 -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 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

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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