Sapphire stone is found in "Sri Lanka" and "Missouri River". It has several chemical and physical properties, including:

Physical properties

• The shape is pyramid / prismatic / barrel-shaped
• The group quarantine oxides

• Scratching colorless / white
• Bear heat
• Hardness 9
• Color is blue / most colors
• Bright
• Transparent to opaque
• The sparkle is almost diamond / glass
• Double refractive shape
• Melting point 2050

Chemical properties

• Refractive index 1.76 / 1.77
• Density 4
• Tri-crystal system
• The chemical formula is aluminum oxide
• Not dissolve