Chalcosiderite

Phoenix United Mine, Minions, Linkinhorne, Liskeard District, Cornwall  United Kingdom

Specimen size: 5.2 × 4.4 × 3.8 cm = 2.05” × 1.73” × 1.50”
Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”