In Medieval India which foreign traveller(s) elaborately discussed about diamonds and diamond mines of India ?

Question

Which Moroccan traveller, who visited India in 14th century and served in the court of Muhammad bin Tughlag, had recorded the account of his travels in 'Rihla' (Voyage) ?

Answer 1

Jean-Bapitiste Tavernier(1605-1689), a French gem merchant and traveller, elaborated about Indian diamonds in his writings.
Popular Hope diamond was delivered by him to Europe