Calagio, Colonnata quarry, Apuane Alps, Carrara, Italy - A dark brown sphalerite crystal shows up on the white marble. The sphalerite is 0.25 cm. Overall size of the specimen is 3.5x2.5x2 cm.

Calagio, Colonnata quarry, Apuane Alps, Carrara, Italy - A dark brown sphalerite crystal shows up on the white marble. The sphalerite is close to 0.3 cm. Overall size of the specimen is 4.5x2.5x2 cm.

Colonnata quarry, Apuane Alps, Carrara, Italy - This marble specimen hosts a cluster of terminated deep brown/red sphalerite crystals of 0.4 cm nicely nested in an open cavity. The cluster shows nicely on the white marble. Overall size is 4x3.5x2 cm.

Colonnata quarry, Apuane Alps, Carrara, Italy - Terminated deep brown/red sphalerite crystals of 0.3 cm. The crystals are well visible on the 3.5x3x3 cm matrix.