Pyrite cube set Navajun Spain

Incredible set of pyrite cubes from the famous Navajun mine in Spain (old collection).

Physical characteristics :

Dimensions: length 170mm x width x95mm x height 140mm

Weight: 2470g 

Chemical formula and composition: FeS₂ (Iron sulfide)

Hardness on Mohs scale: 6-6.5

Density: 5.0 - 5.2 (The higher the density, the heavier the stone for a given size.)

Color and possible variations: Pyrite has a brassy-yellow color with metallic flakes. It can sometimes show grayish or greenish nuances, depending on the impurities present.

Nicknamed "fool's gold" because of its similarity to gold, pyrite has misled many novice gold seekers over the years. The ancient Greeks used pyrite to light fires, as it produces sparks when struck with steel.