Hemstone is found in Bahia / Brazil and has the following chemical and physical properties:

Physical properties

• The shape is subtle crystallization
• Silicate minerals group
  
• White scratching
• Hardness 7
• The color is dark green / contains red spots
• Translucent / Opaque
• Vitreous sparkle

Chemical properties

• The refractive index is not penetrated by light
• Density 2.7
• Hexagonal / triple crystal system

• The chemical formula is silicon dioxide