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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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Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
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44.07ct Black Tourmaline, Emerald Cut, Opaque
Tourmaline Product Video (668453)

44.07ct Black Tourmaline, Emerald Cut, Opaque

37.3 x 11.8 mm

$ 219.47

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1.56ct Green Sphene, Pear Shape, VS-SI
Sphene Product Video (467956)

1.56ct Green Sphene, Pear Shape, VS-SI

7.9 x 6.6 mm

$ 76.91

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

9 x 6 mm (calibrated)

$ 36.62

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10.80ct Pink Morganite, Pear Shape, Translucent
Morganite Product Video (604848)

10.80ct Pink Morganite, Pear Shape, Translucent

20.1 x 12.7 mm

$ 118.32

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9.62ctw Pink Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (608860)

9.62ctw Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 147.56

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0.17ct Yellow Diamond, Round, VS-SI
Diamond Product Video (543911)

0.17ct Yellow Diamond, Round, VS-SI

3.5 mm (calibrated)

$ 306.68

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24.65ct Violet Amethyst, Emerald Cut, VS
Amethyst Product Video (692347)

24.65ct Violet Amethyst, Emerald Cut, VS

20 x 15 mm (calibrated)

$ 143.22

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1.10ct Green Tsavorite Garnet, Heart, VS-SI
Tsavorite Garnet Product Video (415384)

1.10ct Green Tsavorite Garnet, Heart, VS-SI

6.7 x 5.8 mm

$ 602.58

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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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89.04ctw Bi-Color Tourmaline, Fancy, Translucent
Tourmaline Product Video (666919)

89.04ctw Bi-Color Tourmaline, Fancy, Translucent

40.8 x 20.3 mm

$ 1,108.55

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17.43ct Brown Smoky Quartz, Round, VVS
Smoky Quartz Product Video (503802)

17.43ct Brown Smoky Quartz, Round, VVS

18 mm (calibrated)

$ 57.29

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45.23ct Green Serpentine, Pear Shape, Translucent
Serpentine Product Video (671542)

45.23ct Green Serpentine, Pear Shape, Translucent

39.3 x 27.3 mm

$ 96.85

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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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14.93ct Yellow Apatite, Oval, VS
Apatite Product Video (407385)

14.93ct Yellow Apatite, Oval, VS

16.2 x 13.4 mm

$ 616.67

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0.18ct Brown Diamond, Round, VVS-VS
Diamond Product Video (564626)

0.18ct Brown Diamond, Round, VVS-VS

3.7 mm

$ 328.60

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6.58ct Brown Smoky Quartz, Oval, VVS

6.58ct Brown Smoky Quartz, Oval, VVS

14 x 12 mm (calibrated)

$ 26.96

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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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42.68ct Multicolor Jasper, Cushion, Opaque

42.68ct Multicolor Jasper, Cushion, Opaque

30 x 22 mm (calibrated)

$ 35.28

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28.16ct Green Aventurine, Round, Opaque

28.16ct Green Aventurine, Round, Opaque

20 mm (calibrated)

$ 34.25

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6.35ct Brown Smoky Quartz, Marquise, VVS

6.35ct Brown Smoky Quartz, Marquise, VVS

25.3 x 9.1 mm

$ 44.27

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46.56ctw Gray Hematite, Heart, Opaque
Hematite Product Video (342504)

46.56ctw Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 77.29

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25.93ctw White Rainbow Moonstone, Oval, Transparent
Rainbow Moonstone Product Video (669278)

25.93ctw White Rainbow Moonstone, Oval, Transparent

21.8 x 10.4 mm

$ 464.87

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8.03ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385931)

8.03ct Yellow Apatite, Pear Shape, VS

17 x 11 mm

$ 424.06

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28.55ct Multicolor Quartz With Marcasite, Cushion, Transparent
Quartz With Marcasite Product Video (524011)

28.55ct Multicolor Quartz With Marcasite, Cushion, Transparent

21.2 x 18.2 mm

$ 187.68

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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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

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 -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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