Cryptocrystalline Occurs as crystals too small to distinguish with the naked eye. Crystalline - Poor Occurs primarily as crudely formed crystals. Cylindrical Shaped like a cylinder. Deliquescent Crystals absorb water from the air and melt or otherwise deteriorate. Disseminated Occurs in small, distinct particles dispersed in matrix.
Divergent Crystals radiate from a center without producing stellar forms.
Druse Crystal growth in a cavity which results in numerous crystal tipped surfaces. Efflorescences Crystals covering matrix, generally produced from transpiro-evaporation. Encrustations Forms crust-like aggregates on matrix. Euhedral Crystals Occurs as well-formed crystals showing good external form. Fibrous Crystals made up of fibers.