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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
Single
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103.65ct Multicolor Agate, Fancy, Opaque
Agate Product Video (699590)

103.65ct Multicolor Agate, Fancy, Opaque

44.2 x 28 mm

$ 82.59

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9.89ct Brown Smoky Quartz, Round, VVS

9.89ct Brown Smoky Quartz, Round, VVS

15 mm (calibrated)

$ 39.88

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108.15ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (522443)

108.15ct Pink Rose Quartz, Oval, Transparent

37.9 x 26.2 mm

$ 236.98

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0.61ct Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (276515)

0.61ct Green Demantoid Garnet, Oval, VS

6 x 4 mm (calibrated)

$ 139.23

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13.54ctw Black Spinel, Round, Opaque

13.54ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 44.50

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2.41ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (545282)

2.41ct Pink Tourmaline, Emerald Cut, VVS-VS

7.7 x 6.8 mm

$ 151.82

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1.37ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

1.37ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

10 x 5.7 mm

$ 65.59

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32.95ct Multicolor Quartz With Marcasite, Pear Shape, Transparent
Quartz With Marcasite Product Video (521453)

32.95ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

34.4 x 17.3 mm

$ 216.60

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0.14ctw Black Diamond, Square, Opaque

0.14ctw Black Diamond, Square, Opaque

2.2 x 2.2 mm

$ 69.72

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9.14ct Red Strawberry Quartz, Oval, Translucent

9.14ct Red Strawberry Quartz, Oval, Translucent

17.1 x 12.7 mm

$ 70.10

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34.92ct Pink Rose Quartz, Cushion, Transparent
Rose Quartz Product Video (355080)

34.92ct Pink Rose Quartz, Cushion, Transparent

23.7 x 17.6 mm

$ 76.51

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1.11ct Pink Strawberry Quartz, Round, Translucent
Strawberry Quartz Product Video (533170)

1.11ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 7.23

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1.89ct Green Sphene, Pear Shape, VS
Sphene Product Video (381632)

1.89ct Green Sphene, Pear Shape, VS

9.5 x 6.9 mm

$ 155.76

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35.99ct Multicolor Jasper, Fancy, Opaque
Jasper Product Video (363525)

35.99ct Multicolor Jasper, Fancy, Opaque

31.7 x 23.7 mm

$ 59.15

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11.91ct Yellow Cat'S Eye Opal, Oval, Opaque
Cat's Eye Opal Product Video (484212)

11.91ct Yellow Cat'S Eye Opal, Oval, Opaque

15.5 x 13 mm

$ 59.31

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1.39ct Green Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366486)

1.39ct Green Chrysoberyl, Pear Shape, VVS-VS

8.6 x 5.9 mm

$ 161.99

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29.74ct Brown Moonstone, Oval, Opaque

29.74ct Brown Moonstone, Oval, Opaque

22 x 16.3 mm

$ 65.17

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114.72ct Multicolor Psilomelane Dendrite, Oval, Opaque
Psilomelane Dendrite Product Video (691589)

114.72ct Multicolor Psilomelane Dendrite, Oval, Opaque

57.9 x 34.5 mm

$ 92.55

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8.82ct Yellow Apatite, Heart, VS
Apatite Product Video (407300)

8.82ct Yellow Apatite, Heart, VS

14.1 x 13.2 mm

$ 333.95

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0.64ct Multicolor Chocolate Opal, Round, Translucent

0.64ct Multicolor Chocolate Opal, Round, Translucent

6 mm (calibrated)

$ 17.53

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19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 43.14

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1.07ct Yellow Chrysoberyl, Oval, VVS-VS
Chrysoberyl Product Video (366376)

1.07ct Yellow Chrysoberyl, Oval, VVS-VS

7.4 x 5.5 mm

$ 124.77

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30.70ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (351524)

30.70ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 134.54

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42.73ct Multicolor Boulder Opal, Oval, Opaque
Boulder Opal Product Video (322037)

42.73ct Multicolor Boulder Opal, Oval, Opaque

27 x 20 mm (calibrated)

$ 327.70

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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

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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