Yellow Botryoidal Mimetite Crystals
Lead Arsenate Chloride, Pb5(AsO4)3Cl
Crystal System: Hexagonal
- Mimetite is a rare secondary mineral found in the oxidized portions of lead deposits. It is typically
associated with cerusite, plattnerite, wulfenite, smithsonite, hemimorphite, anglesite, limonite
and other oxide zone minerals. Structurally, mimetite is a member of the apatite group; an end-member
of the pyromorphite-mimetite series. It's given as belonging to the monoclinic crystal system in
It occurs as colorless to yellow-brown or orange hexagonal, prismatic crystals which sometimes
exhibit curved faces, and also occurs as rounded, globular forms. Mimetite is often difficult to distiguish
from pyromorphite, and in fact it's name comes from a Greek word meaning "imitator."
- Stuart provides the following remarks:
- "I can only think of two minerals that come in this brilliant lemon yellow color; Sulfur and Mimetite from
Mexico. These are always botryoidal with almost 'mushroom' like shapes."
Rocks from Stuart Wilensky's Collection
Index of Specimen Images
Table of Contents