Volcanic ashes, consisting of small, angular, stony fragments or particles.

small stones or pebbles; volcanic ash

Molten or solid ejected pyroclastic materials ranging from 4 to 32 mm in size.

Volcanic rock materials which are formed when magma is ejected by a volcano. Typically used for material that ranges between 2 and 64 millimeters in diameter.

A general term for pebble to granule sized volcanic ejecta. Angular frothy fragments are called scoria. Finer material is ash and coarser fragments are called bombs or blocks.

Rock fragments between 2 and 64 mm (0.08-2.5 in) in diameter that were ejected from a volcano during an explosive eruption are called lapilli. Lapilli (singular: lapillus) means "little stones" in Italian. Lapilli may consist of many different types of tephra, including scoria, pumice, and reticulite.

ejected rock or pumice fragments between 2 and 64 millimeters across.

Literally, "little stones." Round to angular rock fragments, measuring 1/10 inch to 2 1/2 inches in diameter, which may be ejected in either a solid or molten state.

Marble-to-plum-sized fragments of pyroclastic debris.

rapilli Latin lapillus "little stone" Elemental part of mosaic, volcanic spreading product with the size of a peanut or walnut.

from Italian word meaning small stone; lava fragment main component with crystals of volcanic tuffs.

material from 4 to 32mm in diameter blown out by a volcano.

small rock fragment ejected by a volcano

Lapilli are pieces of rock or lava that range from 2 and 64 millimeters across. Lipilli are thrown into the air by volcanic explosions

Lapilli is a size classification term for tephra.