Formula: CaB₃O₃(OH)₅ · H₂O

Species: Borates

Colour: Colourless, white

Lustre: Vitreous, Silky

Hardness: 2

Specific Gravity: 2.12

Crystal System: Triclinic

Member of: Inderite Group, Occurs principally as an alteration product of Inyoite.

Name: Named in honor of Wilhelm Meyerhoffer (1864–1906), chemist at the University of Vienna and University of Berlin. He was a collaborator with J.H. van’t Hoff on the composition and origin of saline minerals, and he synthesized the compound.

Type Locality: Monte Blanco Mine (Monte Blanco deposit; Monte Blanco adit), Monte Blanco, Black Mountains, Amargosa Range, Inyo Co., California – USA