That's my big chunk of rainbow calcite sitting with some paint.
I got the calcite in South Dakota several years ago on a trip that my husband and I took to the western USA. I came close to not buying, but I ran back in to the shop at the last minute.
I lost the calcite when I moved to Texas and worried it was a casualty of the trip, but my mom found it in Ohio and I brought it home this past fall.
I keep it in my studio now. An old friend.