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8.51 ctw Black Onyx Gemstones, Onyx Gems in Heart Rose-Cut Shape for Sale.
Photos are of Actual Products for Sale
8.51 ctw Black Onyx Stones, Natural Onyx in Heart Rose-Cut Shape for Sale Onyx Gemstones in 10 x 10 mm (calibrated) Size for Sale, Onyx Stones in Black Color

8.51ct Natural Black Onyx, Heart Shape, 10.4x10.3 mm

9.6 out of 10
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Product ID: 669676
Type: Onyx
Weight: 8.51 ct (total) 2 gems
avg. 4.26 ct
Size: 10 x 10 mm calibrated
Size: 10.4 x 10.3 x 4.9 mm
Exact Size: 10.40 x 10.31 x 4.93 mm
Length x Width x Depth
Shape: Heart Rose-Cut
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 2 pcs
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  • Natural certified gemstones

    Gemstone Laboratories
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  • 30-day risk free return policy

$
8.51
Item in Stock
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Product Description

These are 8.51 carat natural black Onyx gems, 2 pcs in heart shape with an exact size of 10.40 x 10.31 x 4.93 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great for buying gemstones, came with authenticity certs. Will buy again someday!

Posted By Uggadugga in May, 2025
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Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
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Overall Rating -> 9 star ratings

I wish there were options for jewelry settings

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate
Download Identification Report PDF
BGL Brief Report $ 18.00
Turnaround Time: 3-4 working days Details
AIG Brief Report $ 35.00
Turnaround Time: 5-10 working days Details
ICA Brief Report $ 90.00
Turnaround Time: 8-12 working days Details
Enlarged Gemstone Image