Old Stuff … not only have we amber rings thousand of years old – now we items a few million years old : Slate.
Slate was originally formed as deep-water mudstones on an ancient sea-floor around 500 million years ago. These rocks were later uplifted, folded and metamorphosed to form slates about 400 million years ago.
Slate splits easily into thin sheets because of the alignment, or foliation, of tiny mica crystals in the rock.
And they make beautiful platters, plates, and coasters – set the table a little bit different !