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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.54ct Green Sphene, Oval, Transparent

1.54ct Green Sphene, Oval, Transparent

7.3 x 6.2 mm

$ 7.67

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579.55ct Pink Star Rose Quartz, Oval, Transparent/Translucent
Star Rose Quartz Product Video (354762)

579.55ct Pink Star Rose Quartz, Oval, Transparent/Translucent

57 x 45.8 mm

$ 1,058.26

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1.95ctw Yellow Citrine, Square, VVS-VS

1.95ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 13.60

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1.18ct Brown Color-Change Garnet, Oval, VS

1.18ct Brown Color-Change Garnet, Oval, VS

7.2 x 5.4 mm

$ 94.27

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0.53ct Yellow Tourmaline, Round, Transparent

0.53ct Yellow Tourmaline, Round, Transparent

5 mm (calibrated)

$ 10.56

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2.04ct Orange Hessonite Garnet, Cushion, VS-SI

2.04ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 30.34

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2.01ct Purple Kunzite, Emerald Cut, VS

2.01ct Purple Kunzite, Emerald Cut, VS

7.4 x 5.7 mm

$ 55.32

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1.18ct Yellow Sphene, Oval, Transparent

1.18ct Yellow Sphene, Oval, Transparent

6.3 x 5.6 mm

$ 5.88

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1.73ctw Orange Moonstone, Trillion, Translucent

1.73ctw Orange Moonstone, Trillion, Translucent

6 x 6 mm (calibrated)

$ 3.47

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3.48ct Yellow Citrine, Oval, VVS-VS

3.48ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 19.07

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5.67ct Violet Amethyst, Pear Shape, VS

5.67ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 44.85

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0.94ct Red Rhodolite Garnet, Pear Shape, VS

0.94ct Red Rhodolite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 24.97

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0.03ct White Diamond, Round, VVS

0.03ct White Diamond, Round, VVS

2.1 mm (calibrated)

$ 68.48

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13.83ct Pink Rose Quartz, Oval, Transparent

13.83ct Pink Rose Quartz, Oval, Transparent

17.2 x 14.2 mm

$ 22.72

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0.48ct Blue Kyanite, Round, SI

0.48ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 11.95

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1.80ct Pink Tourmaline, Oval, VS
Tourmaline Product Video (747475)

1.80ct Pink Tourmaline, Oval, VS

8.3 x 6.3 mm

$ 268.92

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0.55ct Green Tourmaline, Baguette, VVS

0.55ct Green Tourmaline, Baguette, VVS

14.7 x 2.4 mm

$ 19.17

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8.95ct Multicolor Labradorite, Pear Shape, Translucent

8.95ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 19.79

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0.12ct Pink Morganite, Round, VS

0.12ct Pink Morganite, Round, VS

3.5 mm (calibrated)

$ 4.98

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2.40ctw Multicolor Andalusite, Oval, VS

2.40ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 128.69

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12.25ct Gray Jadeite, Oval, Translucent

12.25ct Gray Jadeite, Oval, Translucent

17.7 x 14.1 mm

$ 20.13

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5.64ct Green Malachite, Oval, Opaque

5.64ct Green Malachite, Oval, Opaque

11.6 x 8.5 mm

$ 5.62

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10.71ct Multicolor Boulder Opal, Fancy, Opaque

10.71ct Multicolor Boulder Opal, Fancy, Opaque

24.8 x 15.2 mm

$ 53.34

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0.56ct Blue Spinel, Round, VS

0.56ct Blue Spinel, Round, VS

5 mm (calibrated)

$ 41.83

View Gem
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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!

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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.

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It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

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Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
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