Solange Knowles is the latest celebrity to be added to the A-listers fans of Mawi jewellery. The singer and actress, also famous for her fashion statement public appearences, was spotted wearing a Mawi necklace from the Pyramid collection. Mawi of London has long been a favorite among stars such as Rihanna, Jessie J, Nicki Minaj, Sophie Ellis Bextor and Eliza…