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Galena (Photo) [abbr. Gn ]

Year of discovery: Prehistoric (World), 1875 (Japan)

Locality list: 1,960 localities of galena

• PbS
• [Pb²⁺][S]^2-

• Class: Galena group
• Class: Sulfide
• Soluble in: HCl
• Alter to Anglesite: S => SO₄
• Substitution pseudomorph: Replace Cerussite or Pyromorphite.
• Substitution pseudomorph: Replaced by Djurleite, Pyromorphite, Oxyplumboroméite (Oxyplumboromeite).
• Substitution pseudomorph: Replaced by Chalcocite. (Harrisite)

• Pb => Mn: Alabandite

• S => Se: Clausthalite (Series)
• S => Te: Altaite

• Color: Lead gray
• Streak: Lead gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Cubic, Octahedron, Cubic+Octahedron, Rarely {001} Tabular
• Twin: {111} Contact and Intrusion, {114} lamella

• Cleavage: Perfect on {001} (3 planes), Parting on {111} (4 planes)
• Hardness: 2.5
• Density: 7.6

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=5.9

Etymology: Galena (lead ore or lead solution) in Latin