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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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6.65ct Yellow Rutile Quartz, Pear Shape, Transparent

6.65ct Yellow Rutile Quartz, Pear Shape, Transparent

16.4 x 9 mm

$ 25.51

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1.83ct Green Tourmaline, Emerald Cut, VVS-VS

1.83ct Green Tourmaline, Emerald Cut, VVS-VS

19.6 x 3.4 mm

$ 38.45

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75.20ct Blue Sodalite, Square, Opaque

75.20ct Blue Sodalite, Square, Opaque

25.9 x 25.6 mm

$ 62.42

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10.22ct White Rainbow Moonstone, Pear Shape, Transparent

10.22ct White Rainbow Moonstone, Pear Shape, Transparent

17 x 11.7 mm

$ 183.22

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3.55ct Pink Rose Quartz, Emerald Cut, Transparent

3.55ct Pink Rose Quartz, Emerald Cut, Transparent

9.7 x 9.4 mm

$ 19.46

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0.55ct Yellow Citrine, Cushion, VVS

0.55ct Yellow Citrine, Cushion, VVS

5 x 5 mm (calibrated)

$ 4.11

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10.09ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (487025)

10.09ct Multicolor Fire Agate, Fancy, Opaque

17.1 x 11.9 mm

$ 85.46

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18.50ct Gray Jadeite, Oval, Opaque

18.50ct Gray Jadeite, Oval, Opaque

24.1 x 13.4 mm

$ 60.81

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0.85ct Green Sphene, Oval, Transparent

0.85ct Green Sphene, Oval, Transparent

6 x 5.2 mm

$ 4.23

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48.05ct Multicolor Matrix Opal, Oval, Opaque

48.05ct Multicolor Matrix Opal, Oval, Opaque

39.8 x 29.7 mm

$ 81.36

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0.61ct Orange Zircon, Oval, VS

0.61ct Orange Zircon, Oval, VS

5 x 4 mm (calibrated)

$ 15.19

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55.35ct Green Variscite, Pear Shape, Opaque
Variscite Product Video (650415)

55.35ct Green Variscite, Pear Shape, Opaque

39.8 x 36 mm

$ 65.05

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1.47ct Orange Zircon, Round, VVS

1.47ct Orange Zircon, Round, VVS

6.5 mm (calibrated)

$ 26.84

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2.99ct Multicolor Boulder Opal, Fancy, Opaque

2.99ct Multicolor Boulder Opal, Fancy, Opaque

14.7 x 6.7 mm

$ 12.41

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14.42ct Brown Spessartite Garnet, Flower Cut, Translucent

14.42ct Brown Spessartite Garnet, Flower Cut, Translucent

12.8 x 11.9 mm

$ 12.06

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5.74ctw White Rutile Quartz, Round, Transparent

5.74ctw White Rutile Quartz, Round, Transparent

9 mm (calibrated)

$ 12.58

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2.01ct Orange Hessonite Garnet, Oval, VS

2.01ct Orange Hessonite Garnet, Oval, VS

8.5 x 6.9 mm

$ 31.41

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28.03ct Black Nuummite, Oval, Opaque

28.03ct Black Nuummite, Oval, Opaque

30.1 x 20.6 mm

$ 117.31

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1.48ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.48ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7.3 x 5.5 mm

$ 22.01

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1.15ct Purple Rhodolite Garnet, Oval, VVS

1.15ct Purple Rhodolite Garnet, Oval, VVS

7 x 5.4 mm

$ 40.09

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2.71ctw Red Pyrope Garnet, Marquise, VVS-VS

2.71ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 23.75

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2.43ct Pink Morganite, Pear Shape, Translucent

2.43ct Pink Morganite, Pear Shape, Translucent

10.9 x 7 mm

$ 26.63

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1.77ct Orange Hessonite Garnet, Emerald Cut, VVS

1.77ct Orange Hessonite Garnet, Emerald Cut, VVS

7 x 7 mm (calibrated)

$ 26.33

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22.99ct Violet Amethyst, Round, VVS
Amethyst Product Video (692704)

22.99ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 160.29

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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

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

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