This piece is  a smaller quartz cluster set in bronze.

it measures 1.5 x 2in on an 18in adjustable chain

It enhances energy by absorbing, amplifying, and transmitting. Because it directs and amplifies energy, it is extremely beneficial for manifesting, healing, meditation, and protection.
Quartz is a stone of clarity which dispels negativity and clears away negative energy. It can be used to purify and clarify on the spiritual, mental, and physical planes. It is powerfully protective because of these properties. Quartz enhances spiritual growth, spirituality and wisdom. Because it clarifies thought processes and emotions, it can increase inspiration and creativity.