It measures 2.5cm x 4cm x .5cm It's made of three layers of glass. A layer of Black glass, then a layer of pieces of Green Dichroic glass, then a layer of clear glass with different coloured pieces of Dichroic glass on top all fused together.
It's hard to describe because it has a 3D effect when you look into it.
It comes with a 16" x 1mm Sterling Silver chain in a Black card gift box.