The cat's eye stone (Chrysoberyl) is found in Sri Lanka and has the following physical and chemical properties:

Physical properties

• The shape is mass
  
• Silicate minerals group
  
• White scratching
• Hardness 7
• The color is green
• Semi-transparent
• Vitreous sparkle

Chemical properties

• Density 2.7
• Hexagonal / triple crystal system
• The chemical formula is silicon oxide