Our Tangerine calcite is beautiful!  We have a slab of calcite enveloped by two hunks of acrylic.  We use double cluster sockets, so as the light shines down, the calcite really glows - very cool! 

The lamps measure 29 inches from tabletop to socket top.  The calcite is 12 inches wide and 5 inches deep.  As shown, the top of the lampshade is 31 inches high.  Lampshades are for display only and not available for sale.