Onyx stone is located in "Yemen" / "Madagascar" / "America" ​​/ "Indonesia" and "Pakistan",

It is characterized by the following physical properties:

Physical properties

• Oyster shape
• The metal oxide group
• The scratch is white
• Hardness 6.5 / 7
• black color
• Transparent / opaque
• Silky glassy / silky
• Double refractive shape