USES OF CLEAVAGE, PARTING, AND FRACTURE IN MINERAL IDENTIFICATION

CLEAVAGE IN A MINERAL CRYSTAL[Ref1] Cleavage in a mineral is the tendency for the crystal to split along definite  crystallographic planes as exemplified by the rhombohedron cleaved from a calcite crystal shown in Figure 1[Ref1]. These planes of weakness are present within a regular repeating array of atoms and ions within the crystal and are. . . Read More

USES OF CLEAVAGE, PARTING, AND FRACTURE IN MINERAL IDENTIFICATION-I

Structural failure of a mineral crystal can occur by cleavage, by parting, or by fracture.  The characteristics of any of these failure modes exhibited by a mineral can be useful as tools towards its identification. In this Blog I’ll discuss the properties of cleavage and their use in identifying minerals and follow with a second. . . Read More