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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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30.50ctw Multicolor Jasper, Pear Shape, Opaque

30.50ctw Multicolor Jasper, Pear Shape, Opaque

35.2 x 14.5 mm

$ 48.45

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0.76ct Pink Morganite, Cushion, VVS-VS

0.76ct Pink Morganite, Cushion, VVS-VS

7.7 x 4.6 mm

$ 66.62

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1.26ct Multicolor Opal, Pear Shape, Transparent

1.26ct Multicolor Opal, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 62.12

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1.48ctw Green Demantoid Garnet, Round, VVS-VS
Demantoid Garnet Product Video (325501)

1.48ctw Green Demantoid Garnet, Round, VVS-VS

3.8 mm

$ 162.15

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3.03ct Violet Amethyst, Trillion, VVS-VS

3.03ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.92

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2.04ct Pink Strawberry Quartz, Round, Translucent

2.04ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.23

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14.18ctw Black Spinel, Round, Opaque

14.18ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 46.60

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5.26ct Green Prehnite, Fancy, Translucent

5.26ct Green Prehnite, Fancy, Translucent

12 x 10 mm (calibrated)

$ 8.65

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28.75ct Brown Tiger'S Eye, Fancy, Opaque

28.75ct Brown Tiger'S Eye, Fancy, Opaque

35.3 x 10.4 mm

$ 2.87

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1.00ct Blue Kyanite, Round, SI

1.00ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 24.90

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2.85ct Violet Amethyst, Trillion, VS

2.85ct Violet Amethyst, Trillion, VS

10.5 x 10 mm

$ 19.87

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10.89ctw Violet Amethyst, Oval, Transparent

10.89ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 59.66

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0.91ct Yellow Color-Change Diaspore, Cushion, VS

0.91ct Yellow Color-Change Diaspore, Cushion, VS

6.3 x 5.6 mm

$ 29.91

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28.41ct Multicolor Jasper, Oval, Opaque

28.41ct Multicolor Jasper, Oval, Opaque

29.1 x 19.2 mm

$ 15.57

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1.19ct Yellow Color-Change Diaspore, Cushion, VVS

1.19ct Yellow Color-Change Diaspore, Cushion, VVS

7 x 5 mm (calibrated)

$ 48.56

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13.00ct Multicolor Pietersite, Baguette, Opaque

13.00ct Multicolor Pietersite, Baguette, Opaque

30.4 x 10.4 mm

$ 38.84

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13.95ctw Black Spinel, Heart, Opaque

13.95ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 76.43

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2.23ctw Pink Tourmaline, Round, Transparent

2.23ctw Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 40.72

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1.67ct Yellow Citrine, Round, VVS

1.67ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.30

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6.17ct Pink Morganite, Oval, Translucent

6.17ct Pink Morganite, Oval, Translucent

12 x 10 mm (calibrated)

$ 67.60

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1.59ct Yellow Citrine, Emerald Cut, VVS

1.59ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.67

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1.07ct Purple Rhodolite Garnet, Oval, VS

1.07ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.42

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2.77ct Red Zircon, Oval, VS
Zircon Product Video (406592)

2.77ct Red Zircon, Oval, VS

9 x 7 mm (calibrated)

$ 141.76

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6.60ct Yellow Citrine, Emerald Cut, VVS

6.60ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 42.44

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!

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

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 -> 10 star ratings

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

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

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 -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

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