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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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3.84ct Orange Sunstone, Oval, Transparent

3.84ct Orange Sunstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.10

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0.85ct Orange Zircon, Oval, VVS-VS

0.85ct Orange Zircon, Oval, VVS-VS

5.9 x 4.8 mm

$ 12.70

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2.80ctw Red Pyrope Garnet, Marquise, VVS-VS

2.80ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 24.54

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1.78ct Yellow Citrine, Round, VVS

1.78ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 14.18

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4.74ctw Multicolor Pietersite, Pear Shape, Opaque

4.74ctw Multicolor Pietersite, Pear Shape, Opaque

17.9 x 8.4 mm

$ 11.10

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3.01ctw Multicolor Opal, Round, Translucent
Opal Product Video (477512)

3.01ctw Multicolor Opal, Round, Translucent

6.5 mm (calibrated)

$ 70.27

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2.07ct Yellow Citrine, Trillion, VS

2.07ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 11.21

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2.90ct Orange Hessonite Garnet, Oval, VS

2.90ct Orange Hessonite Garnet, Oval, VS

9.6 x 7.7 mm

$ 63.54

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6.03ct White Topaz, Cushion, VS

6.03ct White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 40.04

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10.17ct White Rose Quartz, Pear Shape, Transparent

10.17ct White Rose Quartz, Pear Shape, Transparent

22.1 x 14 mm

$ 35.42

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1.32ct Yellow Beryl, Round, VVS

1.32ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 26.29

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0.44ct Orange Carnelian, Marquise, Transparent

0.44ct Orange Carnelian, Marquise, Transparent

8 x 4 mm (calibrated)

$ 2.20

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1.67ct Pink Strawberry Quartz, Round, Translucent

1.67ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 12.81

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3.03ct Multicolor Pietersite, Marquise, Opaque

3.03ct Multicolor Pietersite, Marquise, Opaque

20.6 x 6.9 mm

$ 7.42

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21.20ct Multicolor Boulder Opal, Pear Shape, Opaque
Boulder Opal Product Video (449597)

21.20ct Multicolor Boulder Opal, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 162.59

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2.20ct Orange Moonstone, Square, Translucent

2.20ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.40

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3.37ct Yellow Citrine, Emerald Cut, VVS-VS

3.37ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 25.85

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2.91ctw Red Pyrope Garnet, Square, VS

2.91ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.32

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2.90ct Blue Chalcedony, Oval, Transparent

2.90ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.78

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0.66ct Blue Kyanite, Round, SI

0.66ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 16.43

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10.57ct Red Star Garnet, Oval, Opaque

10.57ct Red Star Garnet, Oval, Opaque

12.5 x 9.7 mm

$ 10.42

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1.37ct Orange Hessonite Garnet, Baguette, SI

1.37ct Orange Hessonite Garnet, Baguette, SI

7 x 4.7 mm

$ 30.02

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1.49ctw Yellow Citrine, Heart, VVS-VS

1.49ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.87

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0.88ctw White Rainbow Moonstone, Oval, Transparent

0.88ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 28.93

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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