Smoky Quartz
Smoky quartz is a variety of natural quartz and as such is unscratchable.
Used in the past as a 'shield' against psychic attacks, it is recognised in Traditional Chinese Medicine for stimulating the meridians.
"I didn't choose this stone, it was she who drew me in with her "calmness" and created a magnetic interest in me that led me to use her as the definitive choice for the creation of all those rings in the new collection in which I wanted to enhance the unusual and contemporary metallic tones".