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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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5.96ct Green Prehnite, Fancy, Transparent

5.96ct Green Prehnite, Fancy, Transparent

14.9 x 11.2 mm

$ 25.88

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32.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (333933)

32.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent

22.5 x 16.3 mm

$ 575.49

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11.33ct Blue Color-Change Fluorite, Round, VS

11.33ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 206.89

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2.97ctw Orange Hessonite Garnet, Cushion, VS-SI
Hessonite Garnet Product Video (338676)

2.97ctw Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 112.54

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99.30ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501696)

99.30ctw White Quartz, Pear Shape, Transparent

64.7 x 20.1 mm

$ 326.38

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34.16ct Multicolor Boulder Opal, Oval, Opaque
Boulder Opal Product Video (410119)

34.16ct Multicolor Boulder Opal, Oval, Opaque

23.4 x 19.6 mm

$ 262.36

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1.63ct Orange Sphalerite, Oval, SI-I1

1.63ct Orange Sphalerite, Oval, SI-I1

7.3 x 5.3 mm

$ 81.17

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56.50ct Violet Charoite, Oval, Opaque
Charoite Product Video (567268)

56.50ct Violet Charoite, Oval, Opaque

45.2 x 27 mm

$ 105.86

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10.37ctw Brown Moonstone, Flower Cut, Translucent

10.37ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 45.45

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1.68ct Orange Hessonite Garnet, Cushion, VS-SI

1.68ct Orange Hessonite Garnet, Cushion, VS-SI

6.7 x 6.7 mm

$ 27.23

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1.58ct Purple Spinel, Marquise, VS
Spinel Product Video (369307)

1.58ct Purple Spinel, Marquise, VS

10.6 x 5.8 mm

$ 93.57

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41.49ct Brown Tiger'S Eye, Cushion, Opaque

41.49ct Brown Tiger'S Eye, Cushion, Opaque

27.3 x 23.9 mm

$ 41.33

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54.75ct White Dendritic Agate, Oval, Opaque

54.75ct White Dendritic Agate, Oval, Opaque

36.9 x 23.7 mm

$ 38.18

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14.47ct Green Druzy Variscite, Trillion, Opaque

14.47ct Green Druzy Variscite, Trillion, Opaque

35.4 x 17 mm

$ 61.40

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13.53ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (668809)

13.53ct White Rainbow Moonstone, Pear Shape, Transparent

18.1 x 16.7 mm

$ 242.57

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9.68ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (691480)

9.68ct Purple Kunzite, Pear Shape, VVS-VS

15.2 x 10.9 mm

$ 266.39

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0.31ct Green Kornerupine, Oval, VS-SI

0.31ct Green Kornerupine, Oval, VS-SI

4.7 x 3.7 mm

$ 26.55

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109.25ct Multicolor Jasper, Round, Opaque
Jasper Product Video (600282)

109.25ct Multicolor Jasper, Round, Opaque

46.4 mm

$ 68.23

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5.00ct Brown Diamond, Cushion, VS
Diamond Product Video (460455)

5.00ct Brown Diamond, Cushion, VS

9 x 9 mm (calibrated)

$ 9,203.04

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37.39ct Multicolor Jasper, Oval, Opaque

37.39ct Multicolor Jasper, Oval, Opaque

35.4 x 25.7 mm

$ 22.53

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20.80ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (522410)

20.80ct Multicolor Boulder Opal, Fancy, Opaque

32.3 x 16.8 mm

$ 113.94

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20.10ct Multicolor Boulder Opal, Cushion, Opaque

20.10ct Multicolor Boulder Opal, Cushion, Opaque

21.1 x 16.6 mm

$ 100.10

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1.67ct Green Tourmaline, Fancy, VVS
Tourmaline Product Video (715332)

1.67ct Green Tourmaline, Fancy, VVS

7.8 x 5.7 mm

$ 199.60

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83.06ct Pink Rose Quartz, Pear Shape, Transparent

83.06ct Pink Rose Quartz, Pear Shape, Transparent

32.6 x 24.9 mm

$ 182.00

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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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
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Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 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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