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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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73.50ct Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (639277)

73.50ct Violet Amethyst, Oval, VVS-VS

28.1 x 24.3 mm

$ 504.57

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5.64ct Brown Smoky Quartz, Marquise, Transparent

5.64ct Brown Smoky Quartz, Marquise, Transparent

21.7 x 8.8 mm

$ 6.18

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5.78ct Brown Smoky Quartz, Round, VVS

5.78ct Brown Smoky Quartz, Round, VVS

11 mm (calibrated)

$ 15.84

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43.87ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

43.87ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

38.3 x 22.5 mm

$ 19.66

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0.64ct Pink Morganite, Pear Shape, VVS-VS

0.64ct Pink Morganite, Pear Shape, VVS-VS

8.9 x 4.7 mm

$ 38.56

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8.27ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (623670)

8.27ct Multicolor Fire Agate, Fancy, Opaque

15.3 x 11.7 mm

$ 116.52

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1.47ct Orange Zircon, Round, VVS

1.47ct Orange Zircon, Round, VVS

6.5 mm (calibrated)

$ 26.84

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7.09ct Brown Tiger'S Eye, Oval, Opaque

7.09ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 7.06

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1.71ct Orange Hessonite Garnet, Oval, VS-SI

1.71ct Orange Hessonite Garnet, Oval, VS-SI

8 x 6.7 mm

$ 28.10

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4.11ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471867)

4.11ct Turquoise Grandidierite, Oval, Translucent

12 x 9.5 mm

$ 900.58

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65.52ct Multicolor Chrysocolla, Trillion, Opaque
Chrysocolla Product Video (658575)

65.52ct Multicolor Chrysocolla, Trillion, Opaque

38.7 x 30.8 mm

$ 111.59

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1.75ct Orange Hessonite Garnet, Oval, VS

1.75ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.7 mm

$ 38.35

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28.60ct Black Obsidian, Cushion, Opaque

28.60ct Black Obsidian, Cushion, Opaque

27 x 20 mm (calibrated)

$ 31.33

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1.75ctw Green Demantoid Garnet, Round, VS-SI
Demantoid Garnet Product Video (468977)

1.75ctw Green Demantoid Garnet, Round, VS-SI

3.1 mm

$ 76.69

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13.91ct Violet Amethyst, Cushion, VVS-VS

13.91ct Violet Amethyst, Cushion, VVS-VS

15 x 15 mm (calibrated)

$ 96.98

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38.52ct Yellow Calcite, Pear Shape, Translucent

38.52ct Yellow Calcite, Pear Shape, Translucent

32.1 x 21.8 mm

$ 26.48

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1.90ctw Orange Hessonite Garnet, Emerald Cut, VS

1.90ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 29.14

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1.46ctw Yellow Citrine, Trillion, VVS-VS

1.46ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 11.20

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31.30ct Red Ruby-Zoisite, Flower Cut, Opaque

31.30ct Red Ruby-Zoisite, Flower Cut, Opaque

21.9 x 16.7 mm

$ 37.38

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7.27ct Brown Smoky Quartz, Round, VVS-VS

7.27ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 19.91

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0.92ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.92ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 5.4 mm

$ 28.23

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3.11ct Pink Rose Quartz, Emerald Cut, Transparent

3.11ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 17.04

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22.46ct Blue Turquoise, Oval, Opaque

22.46ct Blue Turquoise, Oval, Opaque

25.2 x 16.6 mm

$ 67.38

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1.21ct Green Tourmaline, Emerald Cut, VS

1.21ct Green Tourmaline, Emerald Cut, VS

18.9 x 3.4 mm

$ 31.81

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

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

All good

Posted By Oliver in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image