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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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26.98ct Brown Tiger'S Eye Matrix, Cushion, Opaque

26.98ct Brown Tiger'S Eye Matrix, Cushion, Opaque

21.3 x 15.5 mm

$ 26.88

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9.30ct Pink Rose Quartz, Emerald Cut, Transparent

9.30ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 50.95

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19.47ctw Multicolor Jasper, Oval, Opaque

19.47ctw Multicolor Jasper, Oval, Opaque

20.5 x 13.7 mm

$ 11.45

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3.48ct Yellow Rutile Topaz, Pear Shape, Transparent

3.48ct Yellow Rutile Topaz, Pear Shape, Transparent

13.8 x 7.5 mm

$ 72.21

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3.42ct Yellow Citrine, Oval, VVS-VS

3.42ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.48

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0.95ctw White Rainbow Moonstone, Oval, Transparent

0.95ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 31.23

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15.19ct Multicolor Pietersite, Round, Opaque

15.19ct Multicolor Pietersite, Round, Opaque

18 mm (calibrated)

$ 58.25

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1.30ct Yellow Color-Change Diaspore, Cushion, VS

1.30ct Yellow Color-Change Diaspore, Cushion, VS

12.8 x 3.8 mm

$ 45.58

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12.94ctw Brown Smoky Quartz, Pear Shape, VVS

12.94ctw Brown Smoky Quartz, Pear Shape, VVS

15.2 x 10.9 mm

$ 35.44

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1.40ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.40ct Yellow Color-Change Diaspore, Emerald Cut, VS

11.6 x 4.2 mm

$ 73.90

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1.00ctw Yellow Citrine, Heart, VVS-VS

1.00ctw Yellow Citrine, Heart, VVS-VS

5.4 x 5.2 mm

$ 6.97

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5.01ct Pink Rose Quartz, Emerald Cut, Transparent

5.01ct Pink Rose Quartz, Emerald Cut, Transparent

10.5 x 10.5 mm

$ 27.45

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63.98ct Brown Tiger'S Eye, Oval, Opaque

63.98ct Brown Tiger'S Eye, Oval, Opaque

35.5 x 26.1 mm

$ 35.05

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3.06ctw White Rainbow Moonstone, Square, Transparent

3.06ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 58.23

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0.95ct Orange Zircon, Oval, VS

0.95ct Orange Zircon, Oval, VS

5.9 x 4.7 mm

$ 14.19

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1.34ct Green Tourmaline, Round, Transparent

1.34ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 17.32

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45.84ct Blue Turquoise, Oval, Opaque

45.84ct Blue Turquoise, Oval, Opaque

28.8 x 23.1 mm

$ 136.97

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2.69ct Purple Kunzite, Emerald Cut, VVS-VS

2.69ct Purple Kunzite, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 74.02

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0.78ct Orange Zircon, Oval, VS

0.78ct Orange Zircon, Oval, VS

6 x 4 mm (calibrated)

$ 19.42

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8.00ct Pink Strawberry Quartz, Oval, Translucent

8.00ct Pink Strawberry Quartz, Oval, Translucent

13.5 x 11.2 mm

$ 48.21

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7.64ct White Dendritic Agate, Pear Shape, Opaque

7.64ct White Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 6.08

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1.50ct Yellow Beryl, Oval, VVS-VS

1.50ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 37.35

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0.52ct Multicolor Opal, Pear Shape, Transparent

0.52ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 12.95

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1.31ct Pink Tourmaline, Oval, Transparent

1.31ct Pink Tourmaline, Oval, Transparent

7.7 x 5.8 mm

$ 22.46

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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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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