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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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0.61ct Pink Tourmaline, Round, Transparent

0.61ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 24.30

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10.86ctw Yellow Rutile Quartz, Oval, Transparent

10.86ctw Yellow Rutile Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 41.64

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4.31ctw Orange Zircon, Round, VVS-VS
Zircon Product Video (481453)

4.31ctw Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 102.80

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0.76ctw White Rainbow Moonstone, Oval, Transparent

0.76ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 20.82

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1.74ct Red Strawberry Quartz, Oval, Transparent

1.74ct Red Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 13.44

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1.02ct Violet Amethyst, Marquise, VVS

1.02ct Violet Amethyst, Marquise, VVS

10 x 5 mm (calibrated)

$ 6.77

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1.62ct Orange Hessonite Garnet, Round, VS-SI

1.62ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 22.72

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0.98ct Yellow Morganite, Pear Shape, VS

0.98ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 53.68

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1.14ct Pink Tourmaline, Emerald Cut, VS-SI

1.14ct Pink Tourmaline, Emerald Cut, VS-SI

10.4 x 4.2 mm

$ 86.19

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2.96ct Brown Smoky Quartz, Marquise, VS

2.96ct Brown Smoky Quartz, Marquise, VS

18.1 x 7.1 mm

$ 17.69

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1.12ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.12ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.1 x 5.3 mm

$ 45.70

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1.84ct Orange Hessonite Garnet, Oval, VS

1.84ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.7 mm

$ 36.65

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1.97ct Orange Pyrope Garnet, Fancy, Translucent

1.97ct Orange Pyrope Garnet, Fancy, Translucent

12.6 x 7.9 mm

$ 4.94

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4.34ctw Yellow Citrine, Oval, VVS-VS

4.34ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 33.28

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1.53ct Yellow Beryl, Oval, VS

1.53ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 36.57

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1.05ct Brown Tiger'S Eye, Pear Shape, Opaque

1.05ct Brown Tiger'S Eye, Pear Shape, Opaque

6.1 x 5.6 mm

$ 1.94

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2.48ct Orange Hessonite Garnet, Cushion, SI

2.48ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 46.52

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1.15ctw Green Peridot, Marquise, VS

1.15ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 17.18

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9.17ctw Multicolor Pietersite, Oval, Opaque

9.17ctw Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 30.14

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1.35ctw White Rainbow Moonstone, Oval, Transparent

1.35ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 22.86

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3.40ct Yellow Citrine, Emerald Cut, Transparent

3.40ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 26.08

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9.48ct Black Tourmaline, Emerald Cut, Opaque

9.48ct Black Tourmaline, Emerald Cut, Opaque

14.5 x 9.4 mm

$ 47.21

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23.80ct Multicolor Jasper, Oval, Opaque

23.80ct Multicolor Jasper, Oval, Opaque

28.1 x 16.5 mm

$ 14.87

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2.64ctw Blue Kyanite, Oval, VS-SI

2.64ctw Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 48.21

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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 -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
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 good

Posted By DouscheGift in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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