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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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0.50ctw Blue Kyanite, Round, VS

0.50ctw Blue Kyanite, Round, VS

3.8 mm

$ 10.38

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1.12ct Yellow Morganite, Oval, VVS-VS

1.12ct Yellow Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 44.07

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52.86ct Violet Amethyst, Oval, VVS
Amethyst Product Video (734713)

52.86ct Violet Amethyst, Oval, VVS

30.5 x 19.3 mm

$ 421.19

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6.74ct Violet Chalcedony, Square, Translucent

6.74ct Violet Chalcedony, Square, Translucent

12 x 12 mm (calibrated)

$ 25.18

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1.53ct Brown Smoky Quartz, Round, VS

1.53ct Brown Smoky Quartz, Round, VS

7.5 mm (calibrated)

$ 6.71

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1.79ct Orange Hessonite Garnet, Oval, VS-SI

1.79ct Orange Hessonite Garnet, Oval, VS-SI

9.1 x 6.5 mm

$ 31.23

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16.67ct White Rainbow Moonstone, Pear Shape, Transparent

16.67ct White Rainbow Moonstone, Pear Shape, Transparent

24.3 x 12.5 mm

$ 249.05

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1.52ctw Blue Kyanite, Oval, VS-SI

1.52ctw Blue Kyanite, Oval, VS-SI

4.9 x 3.2 mm

$ 33.31

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1.75ct Green Sphene, Oval, Transparent

1.75ct Green Sphene, Oval, Transparent

7.5 x 6.1 mm

$ 8.72

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6.79ct Blue Larimar, Round, Opaque

6.79ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 77.57

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5.97ct Black Tourmaline, Emerald Cut, Opaque

5.97ct Black Tourmaline, Emerald Cut, Opaque

12.3 x 8.4 mm

$ 29.73

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0.76ct Green Peridot, Oval, VS

0.76ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.30

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0.92ct Red Fire Opal, Oval, Transparent

0.92ct Red Fire Opal, Oval, Transparent

9.4 x 7 mm

$ 32.07

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18.45ct Pink Kunzite, Marquise, Translucent

18.45ct Pink Kunzite, Marquise, Translucent

24.6 x 11.1 mm

$ 60.65

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2.46ctw Violet Amethyst, Oval, VVS-VS

2.46ctw Violet Amethyst, Oval, VVS-VS

6.2 x 4.2 mm

$ 13.48

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5.40ct Multicolor Boulder Opal, Oval, Opaque

5.40ct Multicolor Boulder Opal, Oval, Opaque

16.4 x 10.3 mm

$ 22.41

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1.56ct Violet Amethyst, Trillion, VS

1.56ct Violet Amethyst, Trillion, VS

8 x 8 mm (calibrated)

$ 10.31

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40.21ct White Rainbow Moonstone, Fancy, Opaque

40.21ct White Rainbow Moonstone, Fancy, Opaque

38.4 x 12.5 mm

$ 3.34

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16.21ct Turquoise Larimar, Oval, Opaque

16.21ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 193.56

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8.90ct Brown Smoky Quartz, Emerald Cut, VVS

8.90ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 17.45

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4.43ct Pink Strawberry Quartz, Round, Translucent

4.43ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 33.97

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17.95ctw White Rainbow Moonstone, Marquise, Transparent
Rainbow Moonstone Product Video (669286)

17.95ctw White Rainbow Moonstone, Marquise, Transparent

21.4 x 9 mm

$ 321.81

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1.77ct Pink Strawberry Quartz, Round, Translucent

1.77ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.58

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2.07ct Orange Moonstone, Cushion, Translucent

2.07ct Orange Moonstone, Cushion, Translucent

7 x 7 mm (calibrated)

$ 4.13

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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

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

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 -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
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