Awesome spattering of black sphalerite coating select faces of golden octahedral pyrite.  This piece is quite unique and presents very well.
 
Shown on 1.5" x 1.5" acrylic base and mounting putty, included with purchase.  From Huanzala Mine, Peru. 
 
Pyrite, often referred to as "fool's gold" due to its striking resemblance to real gold, is a popular mineral among collectors.  It commonly forms in cubic crystals, though it can also manifest in octahedral and pyritohedral forms.  Well-formed cubic or octahedral pyrite crystals are particularly prized by collectors for their geometric perfection.  It has a metallic luster and a pale brass-yellow hue, which can sometimes exhibit a slightly greenish tint. Its reflective, shiny surface makes it visually appealing and easily distinguishable.  Overall, pyrite's aesthetic appeal, variety of forms, and widespread availability make it a fascinating and rewarding mineral for collectors of all levels.