These are gorgeous and very flashy pieces of labradorite that has been put together in mosaic style.
They can be used as coasters or to display your crystals on. You can display them as they are as well as they are so flashy.
Please view carefully, you will see in some photos there are some airholes which happened. Some have and others don't. It doesn't detract at all but I wanted to point it out for those who need to know.
They measure about 4 3/4" across so are large and nice. They are also just over 1/4" thick.