This piece is a rare Green Blue Kyanite.
Kyanite is an aluminum silicate mineral, often occurring as long, striated bladed crystals that may be transparent or translucent with a pearly sheen.
Kyanite promotes good communication, bridging the gap between different beliefs and ideas, and encourages self-expression and speaking one's truth.
Chain: 45 cm, 333 gold / 9k
Setting: 585 gold / 14k
Stone: 3 cm long