Cornelian is a precious stone - cryptocrystalline quartz - a variety of chalcedony, color variations can be found from orange, through red to reddish brown. It is nicknamed "masak" after its characteristic color. In Bohemia, it occurs in the Giant Mountains. The most beautiful carnelians were imported from Botswana, after the ban on the export of raw stones from Botswana, these beautifully colored carnelians are little available.
You always buy the piece directly in the photo, so you can choose the stone that best suits your ideas.