Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite appear on the sample.
Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite cover an entire face of the sample.
Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite appear on the sample.
Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite appear on the sample.
Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite appear on the sample.
Chalcanthite formed from a stalactite, which stands out for its intense blue color. A layer of fine acicular crystals of pickeringite appear on the sample.