PICS Fine Jewellery was founded by Pui In Catherine Siu, a GIA graduate gemologist and skilled artisan devoted to creating exceptional, one-of-a-kind pieces. Each design begins with Catherine’s own vision, sketch, and hands-on craftsmanship — a reflection of her emotions, storytelling, and deep appreciation for unique gemstones. While some bespoke and collection pieces are completed in collaboration with experienced craftsmen — the very mentors who once passed their skills on to her — every creation is guided by Catherine’s artistic direction and carries her distinct creative spirit throughout.