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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: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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White Untreated Gemstones
Yellow Untreated Gemstones
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14.20ctw Green Prehnite, Fancy, Transparent

14.20ctw Green Prehnite, Fancy, Transparent

18.4 x 12 mm

$ 22.25

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5.76ct Multicolor Coral, Round, Translucent

5.76ct Multicolor Coral, Round, Translucent

13 mm (calibrated)

$ 18.93

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2.17ct Pink Kunzite, Pear Shape, VS

2.17ct Pink Kunzite, Pear Shape, VS

7.6 x 7.2 mm

$ 64.84

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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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4.97ct Brown Cat'S Eye Scapolite, Oval, Translucent

4.97ct Brown Cat'S Eye Scapolite, Oval, Translucent

11.1 x 8.5 mm

$ 22.69

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2.54ct Green Peridot, Cushion, VS

2.54ct Green Peridot, Cushion, VS

10 x 8 mm (calibrated)

$ 83.48

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63.97ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (471274)

63.97ct Multicolor Rhodochrosite, Oval, Opaque

39.9 x 25.6 mm

$ 109.33

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7.33ct Turquoise Grandidierite, Emerald Cut, SI-I1
Grandidierite Product Video (547738)

7.33ct Turquoise Grandidierite, Emerald Cut, SI-I1

16 x 9 mm

$ 240.92

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5.04ct Orange Sphalerite, Emerald Cut, SI-I1
Sphalerite Product Video (690765)

5.04ct Orange Sphalerite, Emerald Cut, SI-I1

11 x 7.4 mm

$ 250.99

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57.58ct Multicolor Jasper, Oval, Opaque

57.58ct Multicolor Jasper, Oval, Opaque

44.5 x 28.7 mm

$ 48.57

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13.83ct Pink Kunzite, Oval, VS
Kunzite Product Video (438043)

13.83ct Pink Kunzite, Oval, VS

14.7 x 11.5 mm

$ 303.04

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13.37ct Pink Morganite, Marquise, VS
Morganite Product Video (594874)

13.37ct Pink Morganite, Marquise, VS

27.5 x 10.9 mm

$ 1,831.02

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1.77ct Brown Color-Change Garnet, Pear Shape, VS-SI
Color-Change Garnet Product Video (344767)

1.77ct Brown Color-Change Garnet, Pear Shape, VS-SI

10.5 x 6 mm

$ 158.66

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0.36ct Green Kornerupine, Baguette, VS

0.36ct Green Kornerupine, Baguette, VS

5.2 x 3.3 mm

$ 30.83

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1.62ct Orange Hessonite Garnet, Emerald Cut, SI

1.62ct Orange Hessonite Garnet, Emerald Cut, SI

7.5 x 5.8 mm

$ 22.71

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19.85ct Multicolor Pietersite, Oval, Opaque

19.85ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 86.99

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1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

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6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI
Color-Change Diaspore Product Video (381560)

6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI

12 x 10 mm (calibrated)

$ 3,131.71

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112.60ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (521012)

112.60ct Pink Rose Quartz, Oval, Transparent

35.6 x 25.4 mm

$ 246.73

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3.94ctw Yellow Sillimanite, Oval, VS

3.94ctw Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 97.43

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2.91ctw Blue Kyanite, Oval, SI

2.91ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 50.48

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1.64ct Orange Zircon, Round, VVS-VS

1.64ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 39.11

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45.90ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (691406)

45.90ct Purple Kunzite, Pear Shape, VVS-VS

26.1 x 18.6 mm

$ 1,263.14

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1.18ct Green Tsavorite Garnet, Cushion, VS-SI
Tsavorite Garnet Product Video (415400)

1.18ct Green Tsavorite Garnet, Cushion, VS-SI

5.8 x 5.3 mm

$ 775.68

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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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 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
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