... : slate, marble, granite, stone 2.Shape: square, rectangle, heart,ovale,etc. 3.Color: black, white,red, green, etc. Set of 4 double black slate ... coasterStone NameJOYPlace of OriginJiangxi, China(Mainland)MaterialSlate, Marble, granite,sandstone,natural stoneShaperectangle, square, heart, round, ovale ...