Upon a Star Diamond Jewellery is a London-based brand creating fine jewellery that blends classic influences with contemporary design. Founded by Margarita, a GIA Diamond Expert with a passion for jewellery, design and fashion, the business offers customers professional diamond knowledge and a focus on thoughtful craftsmanship. Its collection features both natural and selected lab-grown diamond pieces, including rings, necklaces, bracelets, earrings and pendants.

Shoppers can explore engagement rings, wedding jewellery, everyday designs and distinctive pieces for special occasions, with examples ranging from diamond tennis bracelets and stud earrings to gemstone and diamond necklaces. Upon a Star also accepts custom orders, inviting customers to share ideas for personalised jewellery suited to their style or occasion. The brand highlights quality, precision, and transparency in diamond sourcing, pricing and customer service.

Based in London, it serves customers across the UK and internationally, with shipping available beyond the UK and free UK shipping on orders over £100