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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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4.76ctw Yellow Citrine, Fancy, VVS-VS

4.76ctw Yellow Citrine, Fancy, VVS-VS

14.1 x 7 mm

$ 26.08

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2.18ctw Red Spessartite Garnet, Round, VS

2.18ctw Red Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 74.04

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35.12ct Multicolor Jasper, Pear Shape, Opaque

35.12ct Multicolor Jasper, Pear Shape, Opaque

34.7 x 22.3 mm

$ 23.85

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3.44ct Yellow Citrine, Oval, VS

3.44ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 18.84

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4.10ctw Violet Amethyst, Oval, VVS-VS

4.10ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.46

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8.32ct Multicolor Boulder Opal, Pear Shape, Opaque

8.32ct Multicolor Boulder Opal, Pear Shape, Opaque

18.8 x 10.2 mm

$ 58.01

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0.67ct Orange Fire Opal, Oval, Transparent
Fire Opal Product Video (585387)

0.67ct Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 19.08

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0.90ct Red Malaya Garnet, Marquise, VS-SI

0.90ct Red Malaya Garnet, Marquise, VS-SI

9.1 x 4.7 mm

$ 41.42

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1.55ctw Yellow Citrine, Pear Shape, VVS-VS

1.55ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 12.35

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4.06ct Pink Rose Quartz, Emerald Cut, Transparent

4.06ct Pink Rose Quartz, Emerald Cut, Transparent

9.4 x 9.4 mm

$ 20.22

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2.39ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.39ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.7 x 4.9 mm

$ 9.48

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0.64ct Pink Tourmaline, Round, Transparent

0.64ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.50

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0.79ct Yellow Citrine, Heart, VVS-VS

0.79ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 6.29

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0.69ct Orange Citrine, Oval, VS

0.69ct Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 6.87

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11.67ct Multicolor Rainbow Pyrite, Fancy, Opaque

11.67ct Multicolor Rainbow Pyrite, Fancy, Opaque

25.3 x 12.2 mm

$ 34.87

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2.04ct Red Coral, Oval, Opaque

2.04ct Red Coral, Oval, Opaque

10.4 x 5.5 mm

$ 335.25

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37.19ct Green Bloodstone, Oval, Opaque

37.19ct Green Bloodstone, Oval, Opaque

21.1 x 14.8 mm

$ 74.09

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26.18ctw Multicolor Jasper, Sphere / Ball, Opaque

26.18ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 28.68

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1.48ct Pink Tourmaline, Oval, Transparent

1.48ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 24.53

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2.20ct Orange Hessonite Garnet, Cushion, VS

2.20ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 41.53

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36.31ctw Multicolor Ruby-Zoisite, Flower Cut, Opaque

36.31ctw Multicolor Ruby-Zoisite, Flower Cut, Opaque

15.5 x 13.9 mm

$ 43.37

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9.98ct Green Prehnite, Fancy, Translucent

9.98ct Green Prehnite, Fancy, Translucent

16.7 x 12 mm

$ 16.40

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1.01ctw Red Pyrope Garnet, Heart, VVS-VS

1.01ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 8.05

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1.16ct Purple Spinel, Cushion, VS

1.16ct Purple Spinel, Cushion, VS

6.4 x 6.3 mm

$ 127.09

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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!

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It was good. There was a large selection at prices I could afford.

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Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

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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
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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
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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
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