A group of fluorite crystals
A group of halite crystals
Plate 61
Amber
Two bottles of petroleum, the left hand one with a paraffin base, the right hand one with an asphalt base
Plate 65
A group of fluorite crystals
A group of halite crystals
Amber
Two bottles of petroleum, the left hand one with a paraffin base, the right hand one with an asphalt base