Gorgeous semi precious translucent gemstone Blue Ice Agate from Oregon cut into a bead pendant. It is drilled side to side near the top with a 4 mm hole for stringing on your own cord or wire, or in your bead creation.
It is 46 mm by 6 to 15 mm wide and 9 mm thick.
Blue Ice Agate is also known as Blue Ice Ocean Agate and sometimes Blue Ice Polka Dot Agate.
It is actually a blue chalcedony. Usually only solid colors are named "chalcedony" and it is found near Madras, Oregon.