It's a logo for a human bone which looks like a leg bone. The bone is tilting from left to right with a heart shape at the bottom left of the icon. On the top right the bone has been broken off an is dangling from the bone.
This Human Bone icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office
, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,700 icons, all in the same style and quality.