4.0 mm Heart Black Onyx
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PRODUCT DETAILS

4.0 mm Heart Black Onyx

A 4.0 mm Heart Black Onyx from Brazil, treated with Dye. Offered as a loose, unmounted gemstone cut to calibrated tolerances for reliable fit across standard settings.

Standard

Quality

Black Onyx

Gemstone
TypeBlack Onyx
ColorBlack
ShapeHeart
Size (mm)4.0
CutCalibrated
TreatmentDye
Country of OriginBrazil
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Teal diamond icon on a dark background.
Exact Stone You See
A teal outline of a certificate with a circular seal in the center.
Certificate of Authenticity
Teal necklace with an ornate pendant featuring an oval shape.
100% Natural Gemstones