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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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28.61ctw Multicolor Fossil Coral, Trillion, Opaque

28.61ctw Multicolor Fossil Coral, Trillion, Opaque

25 x 18 mm (calibrated)

$ 62.69

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2.72ct Blue Kyanite, Round, SI

2.72ct Blue Kyanite, Round, SI

8.5 mm (calibrated)

$ 74.50

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9.84ct Blue Larimar, Oval, Opaque

9.84ct Blue Larimar, Oval, Opaque

16 x 12 mm (calibrated)

$ 97.03

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1.34ct Bi-Color Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (717404)

1.34ct Bi-Color Tourmaline, Emerald Cut, VVS

8.7 x 4.8 mm

$ 360.35

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95.38ct Violet Amethyst, Cushion, VS
Amethyst Product Video (638587)

95.38ct Violet Amethyst, Cushion, VS

28.7 x 25.7 mm

$ 554.16

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16.81ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (628411)

16.81ct Multicolor Boulder Opal, Fancy, Opaque

28.8 x 13.1 mm

$ 83.71

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2.98ct Red Zircon, Pear Shape, VVS-VS
Zircon Product Video (526527)

2.98ct Red Zircon, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 125.24

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5.25ct Orange Hessonite Garnet, Oval, VS-SI
Hessonite Garnet Product Video (333540)

5.25ct Orange Hessonite Garnet, Oval, VS-SI

12 x 10 mm (calibrated)

$ 522.90

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17.12ct Red Strawberry Quartz, Oval, Translucent

17.12ct Red Strawberry Quartz, Oval, Translucent

18.2 x 14.2 mm

$ 131.29

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13.00ct Multicolor Opal, Pear Shape, Opaque

13.00ct Multicolor Opal, Pear Shape, Opaque

19.4 x 13.6 mm

$ 27.84

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11.34ct Brown Star Moonstone, Round, Translucent

11.34ct Brown Star Moonstone, Round, Translucent

13 mm (calibrated)

$ 37.65

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24.20ct Violet Amethyst, Flower Cut, Translucent

24.20ct Violet Amethyst, Flower Cut, Translucent

18.5 x 18.1 mm

$ 66.28

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13.98ct Turquoise Grandidierite, Oval, SI
Grandidierite Product Video (470658)

13.98ct Turquoise Grandidierite, Oval, SI

16.5 x 13.7 mm

$ 7,658.24

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2.61ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

2.61ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 5.3 mm

$ 8.57

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0.73ct Yellow Color-Change Garnet, Emerald Cut, VVS

0.73ct Yellow Color-Change Garnet, Emerald Cut, VVS

7.1 x 3.5 mm

$ 79.18

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13.71ct Yellow Apatite, Cushion, VS
Apatite Product Video (407302)

13.71ct Yellow Apatite, Cushion, VS

14.9 x 14 mm

$ 566.28

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7.82ctw Pink Strawberry Quartz, Round, Translucent

7.82ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 119.95

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1.42ct Violet Sapphire, Pear Shape, VS
Sapphire Product Video (447676)

1.42ct Violet Sapphire, Pear Shape, VS

8.8 x 6.3 mm

$ 748.84

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48.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque
Uvarovite Garnet Drusy Product Video (696564)

48.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque

33.7 x 24.4 mm

$ 59.88

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4.73ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (398223)

4.73ct Yellow Apatite, Pear Shape, VS

15.1 x 9.4 mm

$ 129.56

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2.84ct Green Peridot, Cushion, VS-SI
Peridot Product Video (334362)

2.84ct Green Peridot, Cushion, VS-SI

9.8 x 7.6 mm

$ 84.86

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205.80ct Multicolor Jasper, Round, Opaque
Jasper Product Video (346704)

205.80ct Multicolor Jasper, Round, Opaque

55.7 mm

$ 153.73

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0.11ct Black Diamond, Square, Opaque
Diamond Product Video (677914)

0.11ct Black Diamond, Square, Opaque

2.4 x 2.3 mm

$ 46.29

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52.78ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (344385)

52.78ct Pink Rose Quartz, Oval, Transparent

25 x 21.6 mm

$ 78.07

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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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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