My Cart



Mineral formula: Pb5(AsO4)3Cl

Mineral group: member of the Apatite group

Crystal system: hexagonal

Crystal habit: often simple, barrel-shaped prisms; also equant, rarely tabular, or pyramidal. Also globular, stalactitic, reniform and granular.

Cleavage: poor / indistinct

Fracture: irregular/uneven

Color: pale yellow to orange yellow, green, white, colorless

Luster: sub-adamantine, resinous

Diaphaneity: transparent, translucent

Moh’s scale hardness: 3 ½ - 4

Streak: white

Specific gravity: 7.24

Named after: from the Greek μϊμητής for "imitator," in allusion to its resemblance to pyromorphite, in 1835, by François Sulpice Beudant

Type locality: Treue Freundschaft Mine, Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany

Geological occurrence: a secondary mineral found in the oxidized zones of lead mineral deposits, and in other settings where lead and arsenic occur together.