The molten rock ejected by a volcano from its crater or fissured sides.
Magma.
A shade of red, named after the volcanic lava.
A small stone, especially one rounded by the action of water.
A form of slow-burning gunpowder in large cubical grains.
A particle from 4 to 64 mm in diameter, following the Wentworth scale.
Transparent and colourless rock crystal.
A small droplet of water intentionally sprayed on the ice that cause irregularities on the surface.
To pave with pebbles.
To place a pebble at (a vertex of a graph) according to certain rules; see pebble game.
To deposit water droplets on the ice.
To give (leather) a rough appearance with small rounded prominences.