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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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4.80ct Pink Morganite, Oval, Transparent

4.80ct Pink Morganite, Oval, Transparent

17.4 x 8.7 mm

$ 55.17

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1.27ct Orange Hessonite Garnet, Baguette, VS

1.27ct Orange Hessonite Garnet, Baguette, VS

7 x 5 mm (calibrated)

$ 27.83

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1.54ct Yellow Diamond, Round, SI
Diamond Product Video (378641)

1.54ct Yellow Diamond, Round, SI

7 mm (calibrated)

$ 4,386.78

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2.25ct Orange Spessartite Garnet, Trillion, VVS-VS
Spessartite Garnet Product Video (714467)

2.25ct Orange Spessartite Garnet, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 541.58

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4.79ct Yellow Citrine, Oval, VVS

4.79ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 33.40

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52.53ct Violet Amethyst, Fancy, VVS
Amethyst Product Video (679800)

52.53ct Violet Amethyst, Fancy, VVS

27 x 20 mm (calibrated)

$ 418.56

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1.03ct Orange Hessonite Garnet, Round, VS

1.03ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 17.45

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23.57ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (486948)

23.57ct Blue Aquamarine, Emerald Cut, VVS

30.7 x 9.5 mm

$ 3,521.36

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1.15ct Brown Diamond, Cushion, VS-SI
Diamond Product Video (460448)

1.15ct Brown Diamond, Cushion, VS-SI

6.3 x 5.6 mm

$ 2,645.87

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0.77ct Orange Sphalerite, Oval, SI-I1

0.77ct Orange Sphalerite, Oval, SI-I1

5.6 x 5 mm

$ 38.35

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0.94ct Yellow Color-Change Diaspore, Square, VS

0.94ct Yellow Color-Change Diaspore, Square, VS

5 x 5 mm (calibrated)

$ 46.35

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1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 27.21

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1.12ct Yellow Color-Change Diaspore, Marquise, VS-SI

1.12ct Yellow Color-Change Diaspore, Marquise, VS-SI

10.9 x 5.1 mm

$ 60.22

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4.08ctw Orange Hessonite Garnet, Square, VS-SI
Hessonite Garnet Product Video (392989)

4.08ctw Orange Hessonite Garnet, Square, VS-SI

7 x 7 mm (calibrated)

$ 89.40

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8.87ctw Pink Strawberry Quartz, Oval, Transparent

8.87ctw Pink Strawberry Quartz, Oval, Transparent

11.1 x 9.9 mm

$ 46.82

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22.72ct Violet Amethyst, Emerald Cut, VVS

22.72ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 158.41

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1.62ct Pink Tourmaline, Oval, Transparent

1.62ct Pink Tourmaline, Oval, Transparent

7.6 x 5.7 mm

$ 40.34

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3.65ctw Orange Hessonite Garnet, Square, VS

3.65ctw Orange Hessonite Garnet, Square, VS

6.7 x 6.7 mm

$ 79.98

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0.53ctw White Diamond, Heart, VVS
Diamond Product Video (685658)

0.53ctw White Diamond, Heart, VVS

2.9 x 2.6 mm

$ 2,159.34

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49.70ct Multicolor Psilomelane Dendrite, Oval, Opaque

49.70ct Multicolor Psilomelane Dendrite, Oval, Opaque

38.7 x 22.6 mm

$ 40.10

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13.46ctw Black Spinel, Heart, Opaque

13.46ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 73.74

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74.64ct Green Uvarovite Garnet Drusy, Fancy, Opaque

74.64ct Green Uvarovite Garnet Drusy, Fancy, Opaque

44.6 x 28.9 mm

$ 111.51

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9.84ct Multicolor Labradorite, Marquise, Translucent

9.84ct Multicolor Labradorite, Marquise, Translucent

22.2 x 10.7 mm

$ 11.96

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2.64ct Pink Tourmaline, Emerald Cut, SI

2.64ct Pink Tourmaline, Emerald Cut, SI

10.3 x 5.8 mm

$ 115.69

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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate
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