Rock crystal quarts and amethyst on a oxidized silver chain. 50cm long chain.

Amethyst
Amethyst is a meditative and calming stone which works in the emotional, spiritual, and physical planes to promote calm, balance, and peace. It is also used to eliminate impatience. Amethyst is especially supportive of the emotional body, bringing those who are overworked, overstressed, or overwhelmed back to center. It has healing powers to help with physical ailments and emotional issues. Amethyst resonates with the crown chakra.

Quartz
There is no crystal whose features can be more closely connected to the spiritual worlds than quartz. It enables communication with the higher planes and dimensions of existence that are beyond the visible world. 
It is a perfect crystal for focusing affirmations and prayers.  
Clear Quartz acts as a deep soul cleanser, purifying and enhancing the body's internal structure and surrounding subtle bodies to connect the physical dimension with the mind. With a better perception of the world, Quartz increases awareness and clarity in thinking, and provides enhanced energy, perseverance and patience, teaching one to live, laugh and love with all of humanity.