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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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58.74ct Multicolor Jasper, Cushion, Opaque

58.74ct Multicolor Jasper, Cushion, Opaque

31.5 x 25 mm

$ 53.63

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1.31ct Green Tsavorite Garnet, Pear Shape, SI
Tsavorite Garnet Product Video (415741)

1.31ct Green Tsavorite Garnet, Pear Shape, SI

7.6 x 6.1 mm

$ 974.53

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42.52ct Black Nuummite, Oval, Opaque
Nuummite Product Video (521201)

42.52ct Black Nuummite, Oval, Opaque

27.7 x 25.4 mm

$ 148.30

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0.94ctw Yellow Spessartite Garnet, Oval, VS

0.94ctw Yellow Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 32.77

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15.45ct Multicolor Quartz With Marcasite, Fancy, Transparent

15.45ct Multicolor Quartz With Marcasite, Fancy, Transparent

24.1 x 15.1 mm

$ 84.64

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1.54ct Brown Diamond, Round, SI
Diamond Product Video (378644)

1.54ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 3,655.65

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10.11ct Yellow Rutile Quartz, Round, Transparent

10.11ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 35.12

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2.47ct Green Tourmaline, Emerald Cut, VVS

2.47ct Green Tourmaline, Emerald Cut, VVS

22.6 x 3.6 mm

$ 81.18

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2.92ct Red Zircon, Oval, VS
Zircon Product Video (375266)

2.92ct Red Zircon, Oval, VS

8.4 x 6.7 mm

$ 84.83

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4.42ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (390885)

4.42ct Yellow Apatite, Emerald Cut, VS

10.4 x 9.3 mm

$ 197.49

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8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

16.2 x 13.4 mm

$ 59.96

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6.31ct Turquoise Grandidierite, Oval, SI-I1
Grandidierite Product Video (568861)

6.31ct Turquoise Grandidierite, Oval, SI-I1

13 x 11 mm (calibrated)

$ 283.45

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18.15ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (674275)

18.15ct White Rainbow Moonstone, Pear Shape, Transparent

21.9 x 16.3 mm

$ 225.97

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19.41ct Blue Chalcedony, Pear Shape, Opaque

19.41ct Blue Chalcedony, Pear Shape, Opaque

32.1 x 16.6 mm

$ 48.34

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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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1.84ct Multicolor Opal, Marquise, Transparent

1.84ct Multicolor Opal, Marquise, Transparent

13.8 x 6.7 mm

$ 64.14

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7.19ct Pink Morganite, Oval, Transparent

7.19ct Pink Morganite, Oval, Transparent

14.9 x 11 mm

$ 71.61

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23.21ctw Multicolor Pietersite, Fancy, Opaque

23.21ctw Multicolor Pietersite, Fancy, Opaque

31.2 x 18.6 mm

$ 87.61

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39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

14 mm (calibrated)

$ 62.96

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11.87ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450371)

11.87ct Blue Aquamarine, Emerald Cut, VVS

17.4 x 10 mm

$ 2,955.63

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3.11ctw Multicolor Andalusite, Round, VS

3.11ctw Multicolor Andalusite, Round, VS

3.3 mm

$ 136.73

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10.63ct Yellow Apatite, Heart, VS-SI
Apatite Product Video (384011)

10.63ct Yellow Apatite, Heart, VS-SI

14 x 14 mm (calibrated)

$ 621.67

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11.49ct Brown Star Moonstone, Oval, Translucent

11.49ct Brown Star Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 41.96

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46.91ct Multicolor Rhodochrosite, Oval, Opaque

46.91ct Multicolor Rhodochrosite, Oval, Opaque

35.1 x 19.2 mm

$ 112.60

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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

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
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

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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