There are many holes in the ground in Cyprus which were once filled with massive pyrite deposited by black smokers on the seafloor. These holes are abandoned open-pit mines which now host lakes in the bottom.
These lakes may be astonishingly beautiful. Unfortunately, photos simply can not describe that deep red color adequately enough. This lake occupies the bottom of the Kampia mine.
Beautiful it may be but I would not go swimming there. I wonder what the pH of the water could be? It is definitely strongly acidic. I did not attempt to go down there. The slopes of the quarry do not seem to be very stable.
Almost all of the pyrite is gone, dug out and most likely used to make sulfuric acid which was used in the batteries of our cars. But I was still able to find some nice specimens.
Mathiatis mine is not as beautifully red but it was possible to safely visit the bottom of the quarry.
No massive pyrite is left for us to see. It costs money, you know. Cypriots are no idiots to leave it there. This was closest to massive pyrite I was able to find.
But I found some nice examples of a stockwork. This is basaltic seafloor below the pyritic lens through which hot and metal bearing water rose upward. Stockwork is a mixture of basalt with hydrothermal pyrite and quartz (lower right).
Nice reddish quartz crystals. Red color is probably caused by the hydrothermal alteration of a metal bearing sediment umber deposited between pillows.
A road down to the quarry is paved with slag.
Beautiful poppies growing near the rim of the mine.
Sulfide ore is called “massive” because it contains little else than pure pyrite. Here is an example of a large block of pyrite (pyrite as a rock) in a park behind the visitors center in the village of Troodos (far away from the mines described above).