How to say DIAMOND

Our first question of the new year comes from China: “Hi, Tarle, Could you please make a video on how to pronounce “diamond”?   It is pronounced ['daɪəmənd] in Longman dictionary, but I hear people say ['daɪmənd].   Which one is common in American English? Thank you.” In American English, I hear DIE-MUND, ['daɪmənd