Banská Štiavnica (Schemnitz), Banská Štiavnica Co., Banská Bystrica Region, Slovakia

CuFeS₂

Crystal System: tetragonal
Colour: brass yellow, often with an iridescent tarnish.
Lustre: metallic
Habitus: pseudo-tetrahedral disphenoidal crystals
Fracture: irregular/uneven
Cleavage: poor/indistinct indistinct on {011}, sometimes distinct.
Hardness: 3½ - 4 
Density:   4.18 g/cm³ 
Origin and geological occurrence:  common in sulfide veins and disseminated in igneous rocks

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Samples:

	2.4 Chalcopyrite Disphenoidal golden crystal of chalcopyrite with colorless prismatic crystals of quartz and minor sphalerite. Bottino mine, Apuan Alps, Tuscany, Italy. #sulfides
	2.5 Chalcopyrite Nodule of massive chalcopyrite. #sulfides
	2.19 Chalcopyrite Massive chalcopyrite. #economic minerals