Stone: Natural green onyx
Frame Material: Sterling silver or 18K Gold Over Solid Genuine .925 Sterling Silver.
Shape: Faceted pencil shape with 2 top rings
Measurement: 34mm long 11mm wide, stone size is 34mm by 7mm.
These stones are known as hydrothermal quartz, which contains the same physical, chemical and optical properties of natural stone. For further information and details regarding this process, see the AZ Findings Blog: http://www.azfindings.com/blog.