This coaster was handmade by Chicago artist Rossana Reformado using a gel medium transfer. The coaster is made of 4"x4" tumbled marble tile and each one is an original with its own distinctive look and will vary due to the natural materials of the stone. The top of the coaster is sealed and waterproof. The back is covered with cork and signature by Rossana Reformado near the edge.
The image is from Rossana's collection of Chicago Polaroid SX-70 manipulations, using time zero film. This film was discontinued by Polaroid in December 2005, so the products are very rare and unique.