Druzy Agate gemstone Heart on Onyx beaded necklace

 Genuine onyx gemstones and Sterling silver 

 15.5" long 1.5" oxidized sterling chain 17" total length

Onyx primarily refers to the parallel banded variety of the silicate mineral chalcedony. Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. The colors of its bands range from white to almost every color. The pure black form is the most famous, especially for beads.

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