Kyanite
George Kostopoulos
Shattuckite
George Kostopoulos
Elbaite
George Kostopoulos
Calcite
George Kostopoulos
Kambaldaite
George Kostopoulos
Sugilite
George Kostopoulos
Ammolite
George Kostopoulos
Taaffeite
George Kostopoulos
Connellite
George Kostopoulos
Dendrite
George Kostopoulos
Grandidierite
George Kostopoulos