This is a 1.8" polished, Cherry Creek Jasper worry stone.
are smooth, polished stones, usually in the shape of an oval with a thumb-sized indentation. They are often used by people for relaxation or anxiety relief purposes, the the same way as some people use a fidget spinner. Typically the worry stones are 1 1/2 to 2" across. They are may also be referred to as palm stones, thumb stone, fidget stones, etc.
Cherry creek jasper also known as Red Creek Jasper or Picasso Jasper is a beautiful, veiny stone mined from the Cherry Creek Mine in China. There are a wide variety of colors and brecciated patterns in the stone. Though it's typically referred to as a jasper
, it's not a jasper in a true sense as it's primary component is dolomite, not chalcedony. Like most dolomitic rocks and jaspers it would have formed from sediment laid down by an ancient ocean.