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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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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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31.04ct Violet Amethyst, Oval, IF
Amethyst Product Video (509127)

31.04ct Violet Amethyst, Oval, IF

23.3 x 16.5 mm

$ 238.05

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7.31ct Multicolor Coral, Oval, Translucent

7.31ct Multicolor Coral, Oval, Translucent

16 x 13.9 mm

$ 20.75

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11.53ctw Multicolor Pietersite, Round, Opaque

11.53ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 26.99

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1.50ct Yellow Beryl, Trillion, VS

1.50ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 35.86

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2.02ctw Green Peridot, Emerald Cut, VVS-VS
Peridot Product Video (475124)

2.02ctw Green Peridot, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 55.33

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1.13ct Purple Spinel, Cushion, VS

1.13ct Purple Spinel, Cushion, VS

6.4 x 5.8 mm

$ 78.78

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0.94ct Orange Sphalerite, Round, SI-I1

0.94ct Orange Sphalerite, Round, SI-I1

5.3 mm

$ 46.81

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4.16ct Multicolor Labradorite, Pear Shape, Translucent

4.16ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.20

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118.36ct Green Amazonite, Square, Opaque

118.36ct Green Amazonite, Square, Opaque

28.1 x 27.7 mm

$ 68.77

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38.35ctw Gray Hematite, Marquise, Opaque

38.35ctw Gray Hematite, Marquise, Opaque

28.1 x 12.8 mm

$ 37.39

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1.23ct Orange Hessonite Garnet, Oval, VS

1.23ct Orange Hessonite Garnet, Oval, VS

7.6 x 6 mm

$ 20.85

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10.91ctw Yellow Rutile Quartz, Round, Transparent

10.91ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 29.77

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1.19ctw Orange Zircon, Oval, VVS-VS

1.19ctw Orange Zircon, Oval, VVS-VS

5.2 x 3.9 mm

$ 29.63

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2.42ct Orange Hessonite Garnet, Cushion, VS-SI

2.42ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 39.94

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11.04ct Orange Star Moonstone, Oval, Translucent

11.04ct Orange Star Moonstone, Oval, Translucent

17.6 x 10.3 mm

$ 48.39

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2.74ct Red Zircon, Oval, VS
Zircon Product Video (406734)

2.74ct Red Zircon, Oval, VS

9 x 7 mm (calibrated)

$ 140.23

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30.63ct Multicolor Feather Pyrite, Cushion, Opaque

30.63ct Multicolor Feather Pyrite, Cushion, Opaque

27 x 20 mm (calibrated)

$ 23.90

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10.39ct Black Tourmaline, Oval, Opaque

10.39ct Black Tourmaline, Oval, Opaque

15 x 12.4 mm

$ 51.74

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5.51ct Yellow Citrine, Oval, VVS

5.51ct Yellow Citrine, Oval, VVS

13.8 x 10.3 mm

$ 36.22

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2.65ct Green Prehnite, Oval, Transparent/Translucent

2.65ct Green Prehnite, Oval, Transparent/Translucent

8.3 x 7.2 mm

$ 14.53

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5.80ctw Brown Tiger'S Eye, Oval, Opaque

5.80ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 5.78

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12.16ct Multicolor Boulder Opal, Fancy, Opaque

12.16ct Multicolor Boulder Opal, Fancy, Opaque

22.3 x 17.9 mm

$ 50.46

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2.89ct Violet Amethyst, Trillion, VS

2.89ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.15

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0.64ct Red Pyrope Garnet, Heart, VS

0.64ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 15.94

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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 -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 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

I was able to find what I've been looking for.

Posted By Tree Dog in April, 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
→ View All GemSelect Reviews on Bizrate
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