Lab-grown diamond jewellery brand Jewelbox has raised $3.2 million in a pre-Series A funding round led by V3 Ventures. The round also saw participation from Atrium Angels, Dexter Ventures, Infinyte Club, Samarthya Capital and existing backer JIIF. The Kolkata-based startup plans to use the capital to expand its retail footprint, strengthen brand visibility, and hire talent across key functions.