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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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15.89ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (438948)

15.89ct Yellow Apatite, Emerald Cut, VS

15 x 15 mm (calibrated)

$ 609.32

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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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30.59ctw Multicolor Coral, Cushion, Opaque

30.59ctw Multicolor Coral, Cushion, Opaque

18 x 13 mm (calibrated)

$ 57.98

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7.26ct Green Malachite, Baguette, Opaque

7.26ct Green Malachite, Baguette, Opaque

11.6 x 7.2 mm

$ 9.15

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89.42ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (521011)

89.42ct Pink Rose Quartz, Oval, Transparent

31.8 x 26.8 mm

$ 195.93

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83.94ctw Gray Hematite, Round, Opaque

83.94ctw Gray Hematite, Round, Opaque

23 mm

$ 81.85

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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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24.76ct Green Bloodstone, Oval, Opaque

24.76ct Green Bloodstone, Oval, Opaque

18.6 x 15.5 mm

$ 49.32

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1.37ct Yellow Color-Change Diaspore, Cushion, VS

1.37ct Yellow Color-Change Diaspore, Cushion, VS

8.1 x 5.2 mm

$ 67.55

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43.76ct Multicolor Jasper, Oval, Opaque

43.76ct Multicolor Jasper, Oval, Opaque

33.2 x 24.7 mm

$ 44.59

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10.14ct White Quartz Cat'S Eye, Round, Transparent

10.14ct White Quartz Cat'S Eye, Round, Transparent

13 mm (calibrated)

$ 44.44

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6.99ct Brown Rutile Quartz, Round, Translucent

6.99ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 14.62

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7.22ct Brown Smoky Quartz, Marquise, VS
Smoky Quartz Product Video (601420)

7.22ct Brown Smoky Quartz, Marquise, VS

17.1 x 12 mm

$ 29.12

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13.37ct Pink Morganite, Marquise, VS
Morganite Product Video (594874)

13.37ct Pink Morganite, Marquise, VS

27.5 x 10.9 mm

$ 1,831.02

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10.11ct Yellow Rutile Quartz, Round, Transparent

10.11ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 35.12

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1.04ct Yellow Sphalerite, Oval, SI-I1

1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

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69.17ctw White Howlite, Sphere / Ball, Opaque
Howlite Product Video (422984)

69.17ctw White Howlite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 60.62

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52.12ct Multicolor Jasper, Fancy, Opaque

52.12ct Multicolor Jasper, Fancy, Opaque

43.9 x 27.1 mm

$ 43.97

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8.97ct Blue Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690459)

8.97ct Blue Tourmaline, Flower Cut, Transparent

20.7 x 15.7 mm

$ 244.32

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8.99ctw Pink Strawberry Quartz, Oval, Transparent

8.99ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 137.90

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13.08ct Brown Smoky Quartz, Emerald Cut, VVS
Smoky Quartz Product Video (599326)

13.08ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 35.82

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55.11ct Violet Charoite, Fancy, Opaque
Charoite Product Video (567270)

55.11ct Violet Charoite, Fancy, Opaque

34.5 x 31 mm

$ 103.24

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87.19ct Pink Rose Quartz, Trillion, Transparent
Rose Quartz Product Video (521008)

87.19ct Pink Rose Quartz, Trillion, Transparent

32.9 x 27.6 mm

$ 159.21

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1.08ct Purple Spinel, Pear Shape, VS

1.08ct Purple Spinel, Pear Shape, VS

8.2 x 5.5 mm

$ 100.90

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

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 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

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate
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