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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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2.26ctw Green Peridot, Emerald Cut, VVS-VS

2.26ctw Green Peridot, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 61.90

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7.62ct Green Cat'S Eye Opal, Oval, Opaque

7.62ct Green Cat'S Eye Opal, Oval, Opaque

14 x 12 mm (calibrated)

$ 18.97

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3.62ct Multicolor Fire Agate, Fancy, Opaque

3.62ct Multicolor Fire Agate, Fancy, Opaque

12 x 6.8 mm

$ 27.84

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59.97ct Multicolor Jasper, Oval, Opaque

59.97ct Multicolor Jasper, Oval, Opaque

44.5 x 26.6 mm

$ 34.64

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1.08ct Green Sphene, Oval, Transparent

1.08ct Green Sphene, Oval, Transparent

6.5 x 5.9 mm

$ 5.38

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41.28ct Gray Hematite, Oval, Opaque

41.28ct Gray Hematite, Oval, Opaque

23.4 x 17.2 mm

$ 40.25

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1.74ct Green Tourmaline, Cushion, VS

1.74ct Green Tourmaline, Cushion, VS

7.6 x 6.3 mm

$ 202.19

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0.93ct Red Spinel, Pear Shape, VS-SI
Spinel Product Video (749008)

0.93ct Red Spinel, Pear Shape, VS-SI

8.6 x 5.6 mm

$ 192.98

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0.47ct Orange Spessartite Garnet, Oval, VS

0.47ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 14.04

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0.71ct Orange Citrine, Oval, VVS-VS

0.71ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.07

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3.57ct Yellow Citrine, Oval, VVS

3.57ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.82

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1.61ct Multicolor Opal, Oval, Transparent

1.61ct Multicolor Opal, Oval, Transparent

11.2 x 7.9 mm

$ 74.09

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10.13ct Brown Smoky Quartz, Flower Cut, Transparent

10.13ct Brown Smoky Quartz, Flower Cut, Transparent

16 x 12 mm (calibrated)

$ 37.62

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4.32ct Pink Rose Quartz, Emerald Cut, Transparent

4.32ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 23.66

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23.83ctw Multicolor Fossil Coral, Cushion, Opaque

23.83ctw Multicolor Fossil Coral, Cushion, Opaque

17.7 x 12.3 mm

$ 29.77

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5.58ct Brown Smoky Quartz, Round, VVS

5.58ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 10.95

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32.48ct White Rainbow Moonstone, Baguette, Transparent

32.48ct White Rainbow Moonstone, Baguette, Transparent

33.5 x 11.1 mm

$ 258.80

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0.73ct Yellow Citrine, Heart, Transparent

0.73ct Yellow Citrine, Heart, Transparent

6 x 6 mm (calibrated)

$ 5.09

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4.85ct Violet Amethyst, Pear Shape, VVS

4.85ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 37.20

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19.98ct Green Maw-Sit-Sit, Square, Opaque

19.98ct Green Maw-Sit-Sit, Square, Opaque

15 x 15 mm (calibrated)

$ 65.67

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4.10ct Yellow Apatite, Emerald Cut, VVS-VS
Apatite Product Video (399842)

4.10ct Yellow Apatite, Emerald Cut, VVS-VS

9 x 9 mm (calibrated)

$ 167.87

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2.80ct Yellow Citrine, Oval, VS

2.80ct Yellow Citrine, Oval, VS

10.5 x 7.8 mm

$ 18.41

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13.31ct Pink Rose Quartz, Emerald Cut, Transparent

13.31ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 72.92

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2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.8 x 5.3 mm

$ 9.66

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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

All good

Posted By Oliver in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By PhoenixFeatherJewelry in January, 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
→ View All GemSelect Reviews on Bizrate
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