In China, the Vajra Bodhi is very popular with the person who are insterested in Buddhism. Because it has mythical meaning that it can bring good luck and avoid any unhappy things. The epidermis of Vajra Bodhi will be darker and glossier. And it is popular by the people who are like to study gemstone.
The size of Vajra Bodhi: around 3mm,. As thery are natural, it will be not the same size for each one.
The white beads: Giant Clam
The blue bead: Tianhe stone