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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
Single
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0.78ct Yellow Citrine, Oval, Transparent

0.78ct Yellow Citrine, Oval, Transparent

10.1 x 4.1 mm

$ 5.44

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10.76ctw Multicolor Pietersite, Fancy, Opaque

10.76ctw Multicolor Pietersite, Fancy, Opaque

19.9 x 13.5 mm

$ 40.62

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0.93ct Orange Zircon, Oval, VVS

0.93ct Orange Zircon, Oval, VVS

5.9 x 4.7 mm

$ 13.89

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7.98ctw White Topaz, Square, VVS-VS

7.98ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 63.63

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1.10ct Purple Rhodolite Garnet, Oval, VS

1.10ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 29.22

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11.38ct Black Tourmaline, Emerald Cut, Opaque

11.38ct Black Tourmaline, Emerald Cut, Opaque

16 x 9.3 mm

$ 56.67

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3.59ct Yellow Citrine, Oval, VVS-VS

3.59ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 25.03

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3.36ct Orange Sunstone, Round, Translucent

3.36ct Orange Sunstone, Round, Translucent

10 mm (calibrated)

$ 19.59

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5.30ctw Green Prehnite, Round, Transparent

5.30ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 26.19

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2.28ct Orange Hessonite Garnet, Cushion, VS-SI

2.28ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 38.84

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0.15ctw White Diamond, Round, VVS-VS
Diamond Product Video (567399)

0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 268.16

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1.13ct Red Tourmaline, Oval, Transparent

1.13ct Red Tourmaline, Oval, Transparent

7.4 x 5.8 mm

$ 18.72

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0.52ct Orange Spessartite Garnet, Oval, VS
Spessartite Garnet Product Video (684424)

0.52ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 13.01

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3.63ct Yellow Citrine, Oval, VVS

3.63ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 28.92

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8.70ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

8.70ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

20.8 x 10.3 mm

$ 64.15

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2.93ctw Orange Spessartite Garnet, Round, VVS-VS

2.93ctw Orange Spessartite Garnet, Round, VVS-VS

5 mm (calibrated)

$ 99.51

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13.16ct Multicolor Quartz With Marcasite, Trillion, Translucent
Quartz With Marcasite Product Video (617896)

13.16ct Multicolor Quartz With Marcasite, Trillion, Translucent

17 x 17 mm (calibrated)

$ 72.09

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12.95ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471783)

12.95ct Turquoise Grandidierite, Oval, Translucent

17 x 13.9 mm

$ 2,837.60

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1.83ct Orange Hessonite Garnet, Cushion, VVS-VS

1.83ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 36.45

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31.14ct Multicolor Jasper, Cushion, Opaque

31.14ct Multicolor Jasper, Cushion, Opaque

27 x 23.3 mm

$ 17.68

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6.27ct Multicolor Agate, Round, Opaque

6.27ct Multicolor Agate, Round, Opaque

10 mm (calibrated)

$ 5.93

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100.28ct Blue Sodalite, Square, Opaque

100.28ct Blue Sodalite, Square, Opaque

27.4 x 27.2 mm

$ 83.23

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1.89ct Orange Hessonite Garnet, Oval, VS

1.89ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 28.88

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37.17ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

37.17ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

27 x 20 mm (calibrated)

$ 61.10

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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

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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