An gloomy one. This one will be difficult to recognise with the dramatic lighting and the peculiar shape. You are looking at a big rock polished to have smooth waves/blobs onto which very fine specks of ice rain have fallen. The bit in front has not been polished or perhaps something has broken off. As if it has been sprinkled with powder sugar. Without context, it looks a bit like fungus on a raspberry. © 2017 Fred S. Wouters