About us Companies YETWENE STARDIAM SUPREMA Sustainability Contacts About us Companies YETWENE STARDIAM SUPREMA Sustainability Contacts PT About us We're serious about development Our objective is the socio-economic growth of the countries where we operate. More info We are a multinational, based in Angola – Luanda with subsidiaries in Portugal, the United Arab Emirates, and South Africa. We are dedicated to: Research, exploration, and diamond trade; Import and export of goods and services; Holding Company;