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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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23.47ct Multicolor Jasper, Oval, Opaque

23.47ct Multicolor Jasper, Oval, Opaque

30.6 x 18.3 mm

$ 38.58

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1.24ct Brown Kornerupine, Oval, VVS-VS

1.24ct Brown Kornerupine, Oval, VVS-VS

8.2 x 5.4 mm

$ 102.92

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1.84ct Pink Tourmaline, Oval, VS

1.84ct Pink Tourmaline, Oval, VS

7.6 x 7.2 mm

$ 92.00

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12.09ct Yellow Rutile Quartz, Pear Shape, Transparent

12.09ct Yellow Rutile Quartz, Pear Shape, Transparent

18 x 13 mm (calibrated)

$ 32.85

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14.03ctw Black Spinel, Oval, Opaque

14.03ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 46.11

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21.95ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.95ctw Multicolor Fossil Coral, Pear Shape, Opaque

20.4 x 13.3 mm

$ 48.10

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19.60ct Green Maw-Sit-Sit, Round, Opaque

19.60ct Green Maw-Sit-Sit, Round, Opaque

15 mm (calibrated)

$ 64.42

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0.55ct Orange Sphalerite, Round, SI-I1

0.55ct Orange Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 27.39

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5.51ctw Multicolor Pietersite, Pear Shape, Opaque

5.51ctw Multicolor Pietersite, Pear Shape, Opaque

17.2 x 7.4 mm

$ 13.50

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23.25ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

23.25ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

12 mm (calibrated)

$ 25.48

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1.52ct Green Sphene, Oval, Transparent

1.52ct Green Sphene, Oval, Transparent

7.4 x 6.1 mm

$ 7.57

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0.55ct Yellow Citrine, Heart, VVS

0.55ct Yellow Citrine, Heart, VVS

5.9 x 5.7 mm

$ 4.38

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14.43ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521649)

14.43ct Multicolor Quartz With Marcasite, Oval, Transparent

20 x 15 mm (calibrated)

$ 94.86

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10.36ct Yellow Rutile Quartz, Oval, Transparent

10.36ct Yellow Rutile Quartz, Oval, Transparent

18 x 14.8 mm

$ 28.38

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1.72ct Multicolor Opal, Oval, Translucent

1.72ct Multicolor Opal, Oval, Translucent

11.4 x 7.4 mm

$ 75.38

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13.00ct White Rainbow Moonstone, Pear Shape, Translucent

13.00ct White Rainbow Moonstone, Pear Shape, Translucent

18.7 x 14.3 mm

$ 90.64

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1.93ct Yellow Beryl, Round, VVS

1.93ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 42.29

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1.43ct Orange Zircon, Pear Shape, VVS

1.43ct Orange Zircon, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 34.80

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0.35ct Yellow Citrine, Heart, VVS

0.35ct Yellow Citrine, Heart, VVS

4.9 x 4.8 mm

$ 2.79

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15.79ct Yellow Fire Opal, Oval, Transparent
Fire Opal Product Video (380401)

15.79ct Yellow Fire Opal, Oval, Transparent

22.3 x 14.9 mm

$ 373.84

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1.97ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

1.97ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

6.6 x 4.6 mm

$ 6.47

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1.54ct Yellow Tourmaline, Oval, VVS

1.54ct Yellow Tourmaline, Oval, VVS

7 x 6.4 mm

$ 178.95

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2.26ctw Multicolor Andalusite, Round, VS-SI

2.26ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 111.42

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1.34ct Orange Hessonite Garnet, Cushion, VS

1.34ct Orange Hessonite Garnet, Cushion, VS

7 x 5 mm (calibrated)

$ 24.02

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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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
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 -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The gem I selected was the right size and matched exactly other gems on the bracelet. This greatly pleased me. The picture and color exactly matched the delivery.

Posted By Sam in September, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This was my first experience with this company. I had no difficulty finding the item I wanted, and checking out was a breeze! Ia'm hoping my item arrives quickly, intact, and of good quality. Overall, this was a very satisfactory experience.

Posted By Gem connoisseur in August, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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