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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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48.86ct Multicolor Chrysocolla, Pear Shape, Opaque
Chrysocolla Product Video (658618)

48.86ct Multicolor Chrysocolla, Pear Shape, Opaque

39.2 x 29 mm

$ 83.22

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1.86ct Red Coral, Oval, Opaque

1.86ct Red Coral, Oval, Opaque

10.6 x 5.3 mm

$ 305.67

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9.20ct White Dendritic Agate, Pear Shape, Opaque

9.20ct White Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 7.33

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7.27ct Multicolor Labradorite, Pear Shape, Translucent

7.27ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 16.08

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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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32.37ctw Multicolor Jasper, Marquise, Opaque

32.37ctw Multicolor Jasper, Marquise, Opaque

35.3 x 12.6 mm

$ 56.39

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2.14ct Green Tourmaline, Emerald Cut, VVS-VS

2.14ct Green Tourmaline, Emerald Cut, VVS-VS

24.5 x 3.6 mm

$ 58.61

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23.57ct Gray Hematite, Heart, Opaque

23.57ct Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 51.64

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0.91ct Green Peridot, Oval, VS

0.91ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.34

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70.80ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (734714)

70.80ct Violet Amethyst, Pear Shape, VVS

30.5 x 29.9 mm

$ 564.13

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12.46ct Multicolor Pietersite, Baguette, Opaque

12.46ct Multicolor Pietersite, Baguette, Opaque

26.2 x 10.9 mm

$ 37.23

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9.83ct Black Tourmaline, Cushion, Opaque

9.83ct Black Tourmaline, Cushion, Opaque

15.4 x 12.9 mm

$ 34.95

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0.90ct Green Peridot, Emerald Cut, VVS

0.90ct Green Peridot, Emerald Cut, VVS

6.8 x 4.8 mm

$ 13.45

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4.28ctw Red Pyrope Garnet, Square, VS

4.28ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 32.83

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39.05ct Gray Hematite, Round, Opaque

39.05ct Gray Hematite, Round, Opaque

21.7 mm

$ 38.08

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4.69ctw White Topaz, Cushion, VVS-VS

4.69ctw White Topaz, Cushion, VVS-VS

4.5 x 4.5 mm

$ 25.70

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2.11ct Green Prehnite, Oval, Transparent

2.11ct Green Prehnite, Oval, Transparent

7.7 x 7.4 mm

$ 11.56

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11.24ct White Dendritic Agate, Pear Shape, Opaque

11.24ct White Dendritic Agate, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 8.96

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10.03ct White Rainbow Moonstone, Marquise, Transparent
Rainbow Moonstone Product Video (668713)

10.03ct White Rainbow Moonstone, Marquise, Transparent

23.9 x 9.2 mm

$ 179.82

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1.19ctw Red Pyrope Garnet, Heart, VS

1.19ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 29.63

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3.43ctw Yellow Citrine, Heart, VVS-VS

3.43ctw Yellow Citrine, Heart, VVS-VS

8 x 8 mm (calibrated)

$ 23.91

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3.06ct Yellow Citrine, Oval, VVS

3.06ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.33

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8.58ct Yellow Rutile Quartz, Round, Translucent

8.58ct Yellow Rutile Quartz, Round, Translucent

15 mm (calibrated)

$ 23.31

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1.42ct Yellow Citrine, Emerald Cut, VVS

1.42ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 9.90

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

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 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 -> 10 star ratings

It was easy to navigate

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