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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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0.36ct Pink Morganite, Round, VS

0.36ct Pink Morganite, Round, VS

4.7 mm

$ 14.94

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1.86ct Yellow Sphene, Oval, Transparent

1.86ct Yellow Sphene, Oval, Transparent

6.9 x 6.7 mm

$ 9.26

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3.51ct Orange Sunstone, Round, Translucent

3.51ct Orange Sunstone, Round, Translucent

10 mm (calibrated)

$ 20.46

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9.49ct Pink Rose Quartz, Emerald Cut, Transparent

9.49ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 51.99

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3.03ctw Yellow Citrine, Pear Shape, VVS

3.03ctw Yellow Citrine, Pear Shape, VVS

8 x 5 mm (calibrated)

$ 18.27

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2.59ctw Multicolor Opal, Oval, Translucent

2.59ctw Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 56.67

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4.13ct Yellow Rutile Topaz, Oval, Transparent
Rutile Topaz Product Video (753771)

4.13ct Yellow Rutile Topaz, Oval, Transparent

12 x 10 mm (calibrated)

$ 85.70

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3.69ct Brown Rutile Quartz, Round, Transparent

3.69ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 9.26

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3.82ct Pink Strawberry Quartz, Oval, Translucent

3.82ct Pink Strawberry Quartz, Oval, Translucent

10.4 x 8.7 mm

$ 23.02

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1.00ct Purple Spinel, Cushion, VS
Spinel Product Video (720488)

1.00ct Purple Spinel, Cushion, VS

6.5 x 5.4 mm

$ 149.40

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1.24ctw Green Peridot, Marquise, VVS-VS

1.24ctw Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 18.53

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15.68ct Violet Amethyst, Oval, IF
Amethyst Product Video (745421)

15.68ct Violet Amethyst, Oval, IF

20 x 15 mm (calibrated)

$ 104.12

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1.38ct Violet Amethyst, Marquise, VS

1.38ct Violet Amethyst, Marquise, VS

11.9 x 5.6 mm

$ 10.59

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0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.86

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1.41ct Green Tourmaline, Cushion, VS

1.41ct Green Tourmaline, Cushion, VS

7.7 x 6.7 mm

$ 163.84

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30.10ct Gray Hematite, Marquise, Opaque

30.10ct Gray Hematite, Marquise, Opaque

31.2 x 12.3 mm

$ 29.35

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3.20ct Pink Rose Quartz, Emerald Cut, Transparent

3.20ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 17.53

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15.30ct Multicolor Jasper, Marquise, Opaque

15.30ct Multicolor Jasper, Marquise, Opaque

32.8 x 15.8 mm

$ 16.77

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2.18ctw Multicolor Andalusite, Oval, VS

2.18ctw Multicolor Andalusite, Oval, VS

5.2 x 4.2 mm

$ 116.89

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19.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

19.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

18.7 x 18.1 mm

$ 23.97

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0.82ct Orange Hessonite Garnet, Pear Shape, SI

0.82ct Orange Hessonite Garnet, Pear Shape, SI

7 x 5 mm (calibrated)

$ 15.27

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4.94ct Yellow Rutile Topaz, Pear Shape, Transparent
Rutile Topaz Product Video (753649)

4.94ct Yellow Rutile Topaz, Pear Shape, Transparent

15.8 x 9.3 mm

$ 102.51

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14.62ct Black Tourmaline, Emerald Cut, Opaque

14.62ct Black Tourmaline, Emerald Cut, Opaque

18.3 x 10.9 mm

$ 72.81

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2.21ct Blue Spinel, Emerald Cut, VVS
Spinel Product Video (750861)

2.21ct Blue Spinel, Emerald Cut, VVS

8.4 x 5.9 mm

$ 2,751.45

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 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

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 needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 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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