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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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2.43ct Brown Smoky Quartz, Oval, VVS

2.43ct Brown Smoky Quartz, Oval, VVS

10 x 8 mm (calibrated)

$ 14.53

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2.31ctw Orange Spessartite Garnet, Oval, VS

2.31ctw Orange Spessartite Garnet, Oval, VS

5.3 x 3.9 mm

$ 78.45

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8.06ct White Quartz Cat'S Eye, Round, Transparent

8.06ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 35.32

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30.55ct Multicolor Jasper, Oval, Opaque

30.55ct Multicolor Jasper, Oval, Opaque

25.2 x 19 mm

$ 17.34

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9.87ct Black Tourmaline, Oval, Opaque

9.87ct Black Tourmaline, Oval, Opaque

14 x 12 mm (calibrated)

$ 49.15

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0.76ct Yellow Color-Change Garnet, Emerald Cut, VVS-VS

0.76ct Yellow Color-Change Garnet, Emerald Cut, VVS-VS

7 x 3.5 mm

$ 87.43

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26.78ct White Howlite, Cushion, Opaque

26.78ct White Howlite, Cushion, Opaque

27.1 x 17.7 mm

$ 12.80

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1.74ct Pink Strawberry Quartz, Round, Translucent

1.74ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.35

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1.57ct Green Sphene, Oval, Transparent

1.57ct Green Sphene, Oval, Transparent

7 x 6.1 mm

$ 8.61

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2.94ct Green Prehnite, Oval, Transparent/Translucent

2.94ct Green Prehnite, Oval, Transparent/Translucent

8.8 x 7.7 mm

$ 8.70

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5.98ct Yellow Citrine, Oval, VVS

5.98ct Yellow Citrine, Oval, VVS

14.2 x 10.3 mm

$ 45.87

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6.52ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (683503)

6.52ct Multicolor Fire Agate, Fancy, Opaque

16.8 x 11.4 mm

$ 50.13

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8.36ctw White Topaz, Square, VS

8.36ctw White Topaz, Square, VS

5 x 5 mm (calibrated)

$ 64.11

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19.93ct White Dendritic Agate, Marquise, Translucent

19.93ct White Dendritic Agate, Marquise, Translucent

42.2 x 13.7 mm

$ 39.70

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2.31ct Yellow Citrine, Square, VVS-VS

2.31ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 13.51

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30.73ct Blue Sodalite, Cushion, Opaque

30.73ct Blue Sodalite, Cushion, Opaque

29.7 x 24.1 mm

$ 30.61

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5.41ct Pink Rose Quartz, Emerald Cut, Transparent

5.41ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 29.64

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17.22ct Multicolor Jasper, Oval, Opaque

17.22ct Multicolor Jasper, Oval, Opaque

22.1 x 16.1 mm

$ 37.73

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1.88ct Multicolor Opal, Oval, Transparent

1.88ct Multicolor Opal, Oval, Transparent

11.4 x 8.3 mm

$ 82.39

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0.57ct Red Spinel, Oval, VS

0.57ct Red Spinel, Oval, VS

5.5 x 4.8 mm

$ 47.31

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2.69ct Green Tourmaline, Emerald Cut, VVS-VS

2.69ct Green Tourmaline, Emerald Cut, VVS-VS

24.9 x 3.7 mm

$ 103.15

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20.70ct White Howlite, Pear Shape, Opaque

20.70ct White Howlite, Pear Shape, Opaque

27.2 x 18.3 mm

$ 9.90

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2.37ct Red Almandine Garnet, Oval, VS

2.37ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 88.52

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15.76ct Violet Amethyst, Flower Cut, Translucent

15.76ct Violet Amethyst, Flower Cut, Translucent

16 x 16.7 mm

$ 51.80

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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz 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

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate
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