$200.00 €200 £170.00 approx. This specimen is priced in US dollars, all other prices are approximate.
A roughly triangular thin plate of orange-tan Chalcedony has its top surface covered with opaque milky Quartz pseudomorphs after octagonal Fluorite crystals, a classic specimen from Wheal Mary Ann at Menheniot in Cornwall. Characteristic of this locality, the pseudomorphs form the upper four-sided pyramidal faces of each octahedron and measure between 3 and 8 mm across, with part-octahedrons of up to 1.5 cm on edge. A great example of this classic Wheal Mary Ann pseudomorph.