drip·stone 
(drĭpstōn′)
(drĭpstōn′)n.
1. A protective drip made of stone, as on a cornice over a door or window. Also called hoodmold.
2.
a. A mineral deposit, such as a stalactite or a stalagmite, usually consisting of calcite, formed in caves from dripping water.
b. See flowstone.