Brownite stone is found in "Mexico" / "Germany" / "Brazil" and "Sweden",

It is characterized by several chemical and physical properties, including:

Physical properties

• The shape is hierarchical
• The group is oxides
  
• Scratch black / brown / steel
• Hardness 6.5 / 6
• Color black / brown / gray / steel
• Translucent / Opaque
• Sparkles under my metallic

Chemical properties

• Density 4.8
• Quadrilateral crystal system
• The chemical formula is manganese oxide