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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

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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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0.67ct Yellow Sphalerite, Round, SI-I1

0.67ct Yellow Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 33.37

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8.25ct Violet Amethyst, Cushion, VVS

8.25ct Violet Amethyst, Cushion, VVS

14 x 12 mm (calibrated)

$ 57.52

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24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 15.26

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1.56ctw Multicolor Andalusite, Oval, VS

1.56ctw Multicolor Andalusite, Oval, VS

5.1 x 3.1 mm

$ 83.35

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5.56ctw Orange Hessonite Garnet, Emerald Cut, VS-SI
Hessonite Garnet Product Video (398839)

5.56ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 121.83

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1.41ct Brown Color-Change Garnet, Pear Shape, VS

1.41ct Brown Color-Change Garnet, Pear Shape, VS

9.1 x 5.3 mm

$ 112.65

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23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (382735)

23.10ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent

19.5 x 15.6 mm

$ 405.94

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1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

7 x 5.8 mm

$ 148.20

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26.24ctw Multicolor Fossil Coral, Oval, Opaque

26.24ctw Multicolor Fossil Coral, Oval, Opaque

21.3 x 13.2 mm

$ 33.92

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8.83ct Pink Strawberry Quartz, Oval, Translucent

8.83ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 53.02

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114.96ct Violet Amethyst, Oval, VVS
Amethyst Product Video (610376)

114.96ct Violet Amethyst, Oval, VVS

39.9 x 27.3 mm

$ 734.71

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4.10ctw Red Almandine Garnet, Round, Transparent

4.10ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 23.61

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2.25ct Orange Spessartite Garnet, Trillion, VVS-VS
Spessartite Garnet Product Video (714467)

2.25ct Orange Spessartite Garnet, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 541.58

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1.86ct Pink Strawberry Quartz, Round, Translucent

1.86ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 11.37

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7.90ct Green Prehnite, Fancy, Transparent

7.90ct Green Prehnite, Fancy, Transparent

17.7 x 11.9 mm

$ 12.81

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6.16ct Turquoise Fluorite, Round, Transparent

6.16ct Turquoise Fluorite, Round, Transparent

10.4 mm

$ 24.54

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64.77ct Multicolor Jasper, Oval, Opaque

64.77ct Multicolor Jasper, Oval, Opaque

45.8 x 27.8 mm

$ 26.62

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2.31ct Green Sphene, Oval, SI
Sphene Product Video (413957)

2.31ct Green Sphene, Oval, SI

9.1 x 6.7 mm

$ 253.08

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0.82ct Orange Sphalerite, Round, SI-I1

0.82ct Orange Sphalerite, Round, SI-I1

5.3 mm

$ 40.84

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7.53ctw Green Prehnite, Oval, Transparent
Prehnite Product Video (376785)

7.53ctw Green Prehnite, Oval, Transparent

7.8 x 7.1 mm

$ 57.75

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1.06ct Purple Spinel, Pear Shape, SI

1.06ct Purple Spinel, Pear Shape, SI

7.8 x 5.4 mm

$ 113.24

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0.86ct Red Tourmaline, Oval, Transparent

0.86ct Red Tourmaline, Oval, Transparent

6.4 x 5.8 mm

$ 14.25

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0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

5.5 x 4.2 mm

$ 27.98

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1.20ct Orange Hessonite Garnet, Pear Shape, SI

1.20ct Orange Hessonite Garnet, Pear Shape, SI

8 x 5.7 mm

$ 26.29

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!

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Fast and reliable service.

Posted By Zæck in December, 2025
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Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

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Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
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Overall Rating -> 7 star ratings

Could not get it to work 25 times.

Posted By Dock in July, 2026
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