If you love jewellery, you may already know Katerina Perez – she's the globetrotting jewellery aficionado whose passion has blossomed into a thriving career as an authoritative voice in the industry. With more than 400,000 followers on Instagram, you could call her an influencer, too, but as a jewellery insider with more than 13 years of experience in the business, her expertise goes much deeper than that.