Formula: (Ag,Cu)I

Species: Halides

Colour: Yellow

Lustre: Adamantine

Hardness: 2½ – 3

Specific Gravity: 5.64

Crystal System: Isometric

Member of: Chlorargyrite Group

Name: After Henry A. Miers (1858-1942), Professor of Mineralogy, Oxford, England.

Type Locality: Broken Hill, Broken Hill district, Yancowinna Co., New South Wales – Australia