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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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1.05ct Purple Spinel, Cushion, VVS-VS

6.3 x 5.3 mm

$ 156.87

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0.59ct Orange Citrine, Marquise, VS

8.3 x 4.3 mm

$ 3.53

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6.15ct Violet Amethyst, Marquise, VS

19.5 x 9.8 mm

$ 47.17

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1.43ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 26.10

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30.25ct Multicolor Jasper, Cushion, Opaque

25.6 x 23.7 mm

$ 16.58

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2.36ct Green Prehnite, Oval, Transparent

8.4 x 7.6 mm

$ 15.23

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62.21ctw Multicolor Tourmaline, Fancy, Translucent

23.2 x 20.5 mm

$ 929.42

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4.70ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 10.39

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61.60ct Green Amazonite, Oval, Opaque

44.9 x 22.1 mm

$ 49.09

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74.72ct Multicolor Jasper, Fancy, Opaque

45.4 x 40.3 mm

$ 63.03

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20.43ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 33.57

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2.39ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.33

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3.27ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 25.08

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8.14ct Multicolor Agate, Oval, Opaque

12.9 x 11.8 mm

$ 13.79

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1.82ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 30.61

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12.67ct Bi-Color Ametrine, Oval, VVS

17 x 13.6 mm

$ 83.28

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18.09ct Green Opal, Oval, Opaque

22.3 x 17.6 mm

$ 38.74

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1.56ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 30.77

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14.70ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 24.16

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23.53ct Multicolor Rhodochrosite, Oval, Opaque

20 x 15 mm (calibrated)

$ 51.56

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2.87ct Orange Hessonite Garnet, Round, VS-SI

8 mm (calibrated)

$ 46.51

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1.74ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 13.86

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2.38ct Pink Tourmaline, Emerald Cut, VS

9 x 6 mm (calibrated)

$ 104.30

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13.40ct Multicolor Agate, Oval, Opaque

14 x 12 mm (calibrated)

$ 13.35

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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

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 -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 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

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate
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