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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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7.21ct Multicolor Ruby-Zoisite, Oval, Opaque

7.21ct Multicolor Ruby-Zoisite, Oval, Opaque

14 x 10 mm (calibrated)

$ 17.52

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1.79ct Pink Strawberry Quartz, Round, Translucent

1.79ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.73

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0.91ct Orange Sunstone, Oval, Translucent

0.91ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.34

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39.59ct Multicolor Rainbow Moonstone, Fancy, Opaque

39.59ct Multicolor Rainbow Moonstone, Fancy, Opaque

40.9 x 11.6 mm

$ 3.94

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4.86ct Multicolor Agate, Oval, Translucent

4.86ct Multicolor Agate, Oval, Translucent

9.6 x 9.3 mm

$ 9.68

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5.61ctw Yellow Citrine, Oval, VVS-VS

5.61ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 30.73

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1.03ct Pink Tourmaline, Round, Transparent

1.03ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 17.07

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27.20ct Multicolor Pietersite, Oval, Opaque

27.20ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 119.20

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45.70ct Blue Turquoise, Oval, Opaque

45.70ct Blue Turquoise, Oval, Opaque

32.6 x 18.5 mm

$ 136.55

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1.73ct Orange Moonstone, Trillion, Translucent

1.73ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.44

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25.48ctw Multicolor Fossil Coral, Fancy, Opaque

25.48ctw Multicolor Fossil Coral, Fancy, Opaque

19.6 x 12.8 mm

$ 32.95

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5.66ct Pink Morganite, Oval, Translucent

5.66ct Pink Morganite, Oval, Translucent

14 x 10 mm (calibrated)

$ 62.01

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23.49ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521573)

23.49ct Multicolor Quartz With Marcasite, Oval, Transparent

20.9 x 16.8 mm

$ 154.41

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29.54ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521451)

29.54ct Multicolor Quartz With Marcasite, Oval, Transparent

26.5 x 18.1 mm

$ 194.18

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4.48ctw Multicolor Spectrolite, Oval, Opaque

4.48ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.48

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2.86ct White Opal, Oval, Transparent

2.86ct White Opal, Oval, Transparent

13.3 x 8.5 mm

$ 71.21

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1.29ct Brown Color-Change Garnet, Oval, VS

1.29ct Brown Color-Change Garnet, Oval, VS

6.9 x 5.5 mm

$ 103.05

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12.19ct Multicolor Pietersite, Oval, Opaque

12.19ct Multicolor Pietersite, Oval, Opaque

25 x 12.4 mm

$ 40.47

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6.09ctw Multicolor Opal, Square, Transparent

6.09ctw Multicolor Opal, Square, Transparent

4.7 x 4.6 mm

$ 43.23

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2.37ct Red Almandine Garnet, Oval, VVS-VS

2.37ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 88.52

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2.89ct White Moonstone, Oval, Translucent

2.89ct White Moonstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 7.91

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2.55ctw Red Rhodolite Garnet, Square, VS

2.55ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.32

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3.16ct Multicolor Opal, Pear Shape, Transparent

3.16ct Multicolor Opal, Pear Shape, Transparent

15.8 x 8.3 mm

$ 79.44

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0.84ct Pink Morganite, Pear Shape, VS-SI

0.84ct Pink Morganite, Pear Shape, VS-SI

7.3 x 5.7 mm

$ 36.81

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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 was able to find what I wanted very easily!

Posted By Lenny 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

Easy and good price

Posted By Bry_guy in March, 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 -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate
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