Jewel was from the collection of Queen Nazli, former queen mother of Egypt.
Company drops to 74th place from 69th a year earlier.
Country overtook Botswana in 2023.
European company aims to increase transparency and efficiency throughout supply chain.
Jeweler reports $14.6 million profit following last year’s $25 million loss.
Illegal mining and rebel activity are among factors affecting quality mix and cash flow, company says.
Group revenue up 29% year on year at $2.19 billion.
Group predicts sales for personal products likely to grow up to 4% during 2026.
Exec currently serves as president of Community for Ethical Jewelry.
Charlotte Rose will also be first female leader of any diamond exchange worldwide.
Janet Lam brings more than 17 years of experience to the role.