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4.35 ct Black Onyx Gemstone, Onyx Gem in Heart Checkerboard Shape for Sale.
Photos are of Actual Product for Sale
4.35 ct Black Onyx Stone, Natural Onyx in Heart Checkerboard Shape for Sale Onyx Gemstone in 10.5 x 10.3 mm Size for Sale, Onyx Stone in Black Color

4.35ct Natural Black Onyx, Heart Shape, 10.5x10.3 mm

9.7 out of 10
See Bizrate Ratings for GemSelect
Product ID: 722394
Type: Onyx
Weight: 4.35 ct 1 gem
Size: mm calibrated
Size: 10.5 x 10.3 x 5.1 mm
Exact Size: 10.45 x 10.33 x 5.05 mm
Length x Width x Depth
Shape: Heart Checkerboard
Color: Black
Clarity: Opaque
Treatment: Dyed
Origin: Sri Lanka
Content: 1 pc
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$
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Product Description

This is a 4.35 carat natural black Onyx gem, 1 pc in heart shape with an exact size of 10.45 x 10.33 x 5.05 mm. This loose Onyx gemstone was mined in Sri Lanka and its clarity is Opaque.

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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 website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
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

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate
Download Identification Report PDF
BGL Brief Report $ 18.00
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ICA Brief Report $ 90.00
Turnaround Time: 8-12 working days Details
Enlarged Gemstone Image