Samarskite stone is found in "Russia" and "Brazil" and has the following physical and chemical properties:

Physical properties

• The group oxides
  
• The scratch is reddish brown
• Hardness 5 / 6
• black color
• The sparkle is glassy / resinous

Chemical properties

• Density 5.7
• A rhombic system of crystals exists
• The chemical formula is yttrium oxide and iron