Stone: Black Onyx
Frame Material: 22k gold over Solid Genuine .925 Sterling Silver
Shape: Faceted elongated rectangle shape on both sides.
Measurement: 34mm long 11mm wide, stone size is 30x10mm.
Weight: Ave. 3.3 grams per piece.
These stones are known as hydrothermal quartz, which contains the same physical, chemical and optical properties of a natural stone. Chalcedony stones are extremely similar to quartz with an opaque look. For further information and details regarding this process, see the AZ Findings Blog: http://www.azfindings.com/blog.
Pictures only show the shape of the product, for actual size please read the measurement