The ring pictured is a men's sterling silver ring, l featuring a prominent, square-cut, dark green (often referred to as black) Guatemalan jade gemstone. 
Gemstone: The ring features a single, bold stone of black Guatemalan jade centered in the design. 
Metal: The band is crafted from sterling silver. 
Design Details: The sides of the sterling silver band have a distinct, textured, basket-weave or checkered pattern leading up to the bezel setting of the jade stone. 
Cultural Context: This style of jade use in designs is often associated with preserving ancient Maya techniques and traditions.