Urchin Stupa Mini6x2x2, 1kg cast crystal This stunning and rare Urchin Stupa Mini brings life and beauty to any room. Four stacked sea urchins of different sizes cascading in fading shades of citrine, orange and pink hues. Add this special artwork to your collection and bring a natural, calming energy to your home. Lightning flashes in the darkness of night, and until the stars are born, let this spellbinding crystal sculpture shine.