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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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13.51ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (522183)

13.51ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

23.4 x 13.9 mm

$ 88.81

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29.24ct Black Obsidian, Pear Shape, Opaque

29.24ct Black Obsidian, Pear Shape, Opaque

28.5 x 19.7 mm

$ 21.85

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0.96ct Orange Hessonite Garnet, Round, VS-SI
Hessonite Garnet Product Video (524645)

0.96ct Orange Hessonite Garnet, Round, VS-SI

5.3 mm

$ 11.56

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33.05ct Multicolor Pietersite, Oval, Opaque

33.05ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 108.63

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0.17ct Yellow Diamond, Round, VS
Diamond Product Video (543902)

0.17ct Yellow Diamond, Round, VS

3.5 mm (calibrated)

$ 306.68

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10.12ct Blue Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690462)

10.12ct Blue Tourmaline, Flower Cut, Transparent

20.5 x 16.1 mm

$ 197.26

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0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 153.38

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5.48ct Orange Spessartite Garnet, Oval, Translucent
Spessartite Garnet Product Video (424330)

5.48ct Orange Spessartite Garnet, Oval, Translucent

11 x 9 mm (calibrated)

$ 142.13

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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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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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10.57ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (407299)

10.57ct Yellow Apatite, Emerald Cut, VS

15.1 x 10.9 mm

$ 289.52

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19.41ct Blue Chalcedony, Pear Shape, Opaque

19.41ct Blue Chalcedony, Pear Shape, Opaque

32.1 x 16.6 mm

$ 48.53

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7.84ct Brown Smoky Quartz, Emerald Cut, VVS

7.84ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 32.90

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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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2.44ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.44ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.7 x 7.3 mm

$ 40.10

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37.60ct Multicolor Spectrolite, Cushion, Opaque
Spectrolite Product Video (513071)

37.60ct Multicolor Spectrolite, Cushion, Opaque

45 x 24 mm

$ 134.71

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25.97ct White Rainbow Moonstone, Oval, Translucent
Rainbow Moonstone Product Video (674102)

25.97ct White Rainbow Moonstone, Oval, Translucent

24.1 x 17.2 mm

$ 323.33

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25.96ct Multicolor Rainbow Pyrite, Marquise, Opaque

25.96ct Multicolor Rainbow Pyrite, Marquise, Opaque

40 x 14 mm

$ 67.23

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0.64ct Multicolor Chocolate Opal, Round, Translucent

0.64ct Multicolor Chocolate Opal, Round, Translucent

6 mm (calibrated)

$ 17.53

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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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12.80ct Pink Rose Quartz, Emerald Cut, Transparent

12.80ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 58.43

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9.06ct Green Prehnite, Round, Translucent

9.06ct Green Prehnite, Round, Translucent

14 mm (calibrated)

$ 44.67

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19.58ct Pink Coral, Flower Cut, Opaque
Coral Product Video (256350)

19.58ct Pink Coral, Flower Cut, Opaque

18.2 x 16.9 mm

$ 286.03

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5.18ct Yellow Apatite, Oval, VS-SI
Apatite Product Video (387570)

5.18ct Yellow Apatite, Oval, VS-SI

13.4 x 9.7 mm

$ 277.12

View Gem
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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Ia've been searching for a source to get my gemstones for awhile now and was very happy to come across this website. Amazing variety for any income.

Posted By Tarah in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Maneuvering through the website was easy and enjoyable. I have ordered from GemSelect before and that experience was also pleasant.

Posted By Willow in August, 2026
Source: Bizrate
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