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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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6.89ct Yellow Citrine, Oval, VVS

6.89ct Yellow Citrine, Oval, VVS

13.8 x 11 mm

$ 41.74

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2.09ct Red Almandine Garnet, Marquise, VS

2.09ct Red Almandine Garnet, Marquise, VS

12 x 6 mm (calibrated)

$ 78.06

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2.90ct Multicolor Labradorite, Baguette, Translucent

2.90ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 3.98

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1.00ct White Rainbow Moonstone, Oval, Transparent

1.00ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 32.88

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1.06ct Brown Smoky Quartz, Round, VVS

1.06ct Brown Smoky Quartz, Round, VVS

7 mm (calibrated)

$ 5.28

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2.56ctw Red Pyrope Garnet, Marquise, VVS-VS

2.56ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 22.44

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0.74ct Pink Morganite, Cushion, VS

0.74ct Pink Morganite, Cushion, VS

7.2 x 4.2 mm

$ 33.17

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0.65ct Orange Sphalerite, Oval, SI

0.65ct Orange Sphalerite, Oval, SI

5.3 x 4.9 mm

$ 32.37

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0.90ct Pink Malaya Garnet, Round, VS

0.90ct Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 38.53

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54.00ct Multicolor Rhodonite, Oval, Opaque

54.00ct Multicolor Rhodonite, Oval, Opaque

31.3 x 21.1 mm

$ 31.19

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2.79ct Violet Amethyst, Trillion, VS

2.79ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.23

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15.06ct Green Uvarovite Garnet Drusy, Oval, Opaque

15.06ct Green Uvarovite Garnet Drusy, Oval, Opaque

18.9 x 12.5 mm

$ 49.00

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2.96ct Violet Amethyst, Trillion, VVS-VS

2.96ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.46

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13.24ct Yellow Calcite, Pear Shape, Translucent

13.24ct Yellow Calcite, Pear Shape, Translucent

30.2 x 17 mm

$ 9.11

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12.54ct Bi-Color Ametrine, Cushion, VVS

12.54ct Bi-Color Ametrine, Cushion, VVS

16.8 x 13 mm

$ 93.67

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1.53ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458598)

1.53ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.7 mm

$ 167.63

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1.90ct Green Sphene, Oval, Transparent

1.90ct Green Sphene, Oval, Transparent

7.2 x 6.6 mm

$ 10.41

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26.84ct Pink Rose Quartz, Oval, Transparent

26.84ct Pink Rose Quartz, Oval, Transparent

20.7 x 18.8 mm

$ 53.47

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0.60ct Green Peridot, Marquise, VS

0.60ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.96

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3.88ctw Pink Strawberry Quartz, Round, Translucent

3.88ctw Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 23.72

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32.33ctw Gray Hematite, Emerald Cut, Opaque

32.33ctw Gray Hematite, Emerald Cut, Opaque

18.3 x 13.8 mm

$ 31.52

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130.99ct Yellow Quartz, Oval, VVS
Quartz Product Video (470091)

130.99ct Yellow Quartz, Oval, VVS

42.3 x 25.4 mm

$ 179.39

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24.53ctw Green Prehnite, Fancy, Transparent

24.53ctw Green Prehnite, Fancy, Transparent

16.8 x 11.1 mm

$ 34.13

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1.05ct Multicolor Opal, Oval, Transparent

1.05ct Multicolor Opal, Oval, Transparent

9.3 x 7.3 mm

$ 26.15

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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 -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb 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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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