The Adella Necklace has been delicately crafted, featuring hand-strung mini baroque pearls and a unique 18k gold-plated ammonite pendant framed between textured gold-plated beads. The Adella Necklace has been delicately crafted, featuring hand-strung mini baroque pearls and a unique 18k gold-plated ammonite pendant framed between textured gold-plated beads. By Alona is a demi-fine London-based jewellery brand that celebrates Mediterranean heritage. Created by Alona Shelemy, the daughter of a fine jeweller, who fell in love with the world of jewellery at a young age, each piece is hand-crafted using 18 karat gold-plated bronze, rhodium, gold or sterling silver - with the adornment of semi-precious gemstones - to design modern and contemporary jewellery exuding chic opulence.