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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
Single
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2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.7 x 5 mm

$ 11.65

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2.25ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

2.25ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

7 x 4.7 mm

$ 7.10

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2.53ct Blue Kyanite, Round, SI

2.53ct Blue Kyanite, Round, SI

8 mm (calibrated)

$ 69.31

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30.70ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (351524)

30.70ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 134.54

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2.54ct Brown Cat'S Eye Scapolite, Oval, Translucent

2.54ct Brown Cat'S Eye Scapolite, Oval, Translucent

8.6 x 8 mm

$ 13.91

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0.17ct Yellow Diamond, Round, VS
Diamond Product Video (564607)

0.17ct Yellow Diamond, Round, VS

3.5 mm (calibrated)

$ 282.13

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20.00ct Multicolor Jasper, Oval, Opaque

20.00ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 43.82

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43.39ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (528821)

43.39ct Pink Rose Quartz, Pear Shape, Transparent

30 x 20.2 mm

$ 79.23

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5.60ct Green Amazonite, Marquise, Opaque

5.60ct Green Amazonite, Marquise, Opaque

20 x 10 mm (calibrated)

$ 11.20

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37.10ctw Multicolor Fossil Coral, Cushion, Opaque

37.10ctw Multicolor Fossil Coral, Cushion, Opaque

18.4 x 15 mm

$ 66.25

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23.45ctw Multicolor Fossil Coral, Oval, Opaque

23.45ctw Multicolor Fossil Coral, Oval, Opaque

20 x 12.7 mm

$ 29.28

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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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3.17ctw Orange Hessonite Garnet, Cushion, SI
Hessonite Garnet Product Video (338674)

3.17ctw Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 120.12

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5.95ct Green Apatite, Emerald Cut, VS
Apatite Product Video (399658)

5.95ct Green Apatite, Emerald Cut, VS

10 x 10 mm (calibrated)

$ 312.25

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23.14ct Multicolor Quartz With Marcasite, Oval, Transparent

23.14ct Multicolor Quartz With Marcasite, Oval, Transparent

23.8 x 16.1 mm

$ 152.11

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9.80ct Green Grandidierite, Pear Shape, SI-I1
Grandidierite Product Video (568864)

9.80ct Green Grandidierite, Pear Shape, SI-I1

20 x 13.2 mm

$ 440.22

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2.15ct Orange Hessonite Garnet, Baguette, VS-SI

2.15ct Orange Hessonite Garnet, Baguette, VS-SI

7.6 x 5.7 mm

$ 40.62

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56.79ct Multicolor Rainbow Pyrite, Fancy, Opaque
Rainbow Pyrite Product Video (645836)

56.79ct Multicolor Rainbow Pyrite, Fancy, Opaque

34.8 x 17.6 mm

$ 147.06

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2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5 mm

$ 6.49

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28.63ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (350678)

28.63ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 125.46

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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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7.36ct Pink Rose Quartz, Emerald Cut, Transparent

7.36ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 33.60

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35.09ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521447)

35.09ct Multicolor Quartz With Marcasite, Oval, Transparent

28.7 x 21.5 mm

$ 230.67

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3.56ct Green Sphene, Oval, Translucent

3.56ct Green Sphene, Oval, Translucent

10.5 x 8.3 mm

$ 21.33

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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

This was my first experience with this company. I had no difficulty finding the item I wanted, and checking out was a breeze! Ia'm hoping my item arrives quickly, intact, and of good quality. Overall, this was a very satisfactory experience.

Posted By Gem connoisseur in August, 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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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 -> 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
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