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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
Pairs
Lots
Faceted
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2.07ct Orange Sunstone, Oval, Translucent

2.07ct Orange Sunstone, Oval, Translucent

9.4 x 7.6 mm

$ 12.37

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38.66ct Black Tourmaline, Emerald Cut, Opaque
Tourmaline Product Video (701521)

38.66ct Black Tourmaline, Emerald Cut, Opaque

18.6 x 16.9 mm

$ 192.53

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3.87ctw Red Pyrope Garnet, Square, VS

3.87ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 26.98

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11.49ct Black Tourmaline, Oval, Opaque

11.49ct Black Tourmaline, Oval, Opaque

16 x 12.9 mm

$ 57.22

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33.75ct White Scolecite, Oval, Opaque

33.75ct White Scolecite, Oval, Opaque

34.7 x 25.1 mm

$ 39.94

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1.41ct Green Tourmaline, Oval, Transparent

1.41ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 24.17

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6.06ct Pink Rose Quartz, Round, Transparent

6.06ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 24.10

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0.97ct Gray Sillimanite Cat'S Eye, Oval, Translucent

0.97ct Gray Sillimanite Cat'S Eye, Oval, Translucent

6.4 x 4.2 mm

$ 2.90

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1.20ct Purple Spinel, Oval, VVS-VS
Spinel Product Video (349497)

1.20ct Purple Spinel, Oval, VVS-VS

8 x 5 mm (calibrated)

$ 82.17

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2.24ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (221438)

2.24ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 110.44

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5.19ct Pink Rose Quartz, Emerald Cut, Transparent

5.19ct Pink Rose Quartz, Emerald Cut, Transparent

10.5 x 10.5 mm

$ 28.44

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19.64ct Bi-Color Ametrine, Oval, VS

19.64ct Bi-Color Ametrine, Oval, VS

18.6 x 15.4 mm

$ 129.10

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1.14ct Pink Tourmaline, Emerald Cut, VVS-VS

1.14ct Pink Tourmaline, Emerald Cut, VVS-VS

7.5 x 4.7 mm

$ 86.19

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26.23ct Multicolor Boulder Opal, Pear Shape, Opaque

26.23ct Multicolor Boulder Opal, Pear Shape, Opaque

23.2 x 17 mm

$ 201.16

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31.95ct Green Aventurine, Fancy, Opaque

31.95ct Green Aventurine, Fancy, Opaque

42.4 x 10 mm

$ 2.66

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28.18ct Brown Smoky Quartz, Oval, Transparent

28.18ct Brown Smoky Quartz, Oval, Transparent

31.7 x 19.3 mm

$ 46.31

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2.43ct Yellow Citrine, Oval, VVS

2.43ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 13.31

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5.33ct Violet Amethyst, Pear Shape, Transparent

5.33ct Violet Amethyst, Pear Shape, Transparent

16.8 x 9.8 mm

$ 31.86

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0.81ct Yellow Citrine, Marquise, VS

0.81ct Yellow Citrine, Marquise, VS

9 x 5 mm

$ 6.46

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2.38ctw Pink Strawberry Quartz, Oval, Translucent

2.38ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 14.74

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1.68ct Multicolor Opal, Marquise, Transparent

1.68ct Multicolor Opal, Marquise, Transparent

16.2 x 6.7 mm

$ 58.56

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1.03ct Yellow Zircon, Oval, VVS-VS

1.03ct Yellow Zircon, Oval, VVS-VS

6 x 4.9 mm

$ 25.65

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2.41ctw Red Pyrope Garnet, Marquise, VVS-VS

2.41ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 21.12

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1.44ct Yellow Citrine, Emerald Cut, VVS-VS

1.44ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.46

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

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel 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

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate
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