Beline Book Gold (Redmi 10A) " or "Gold Book (Redmi 10A) ". "Gold " is an adjective modifying "Βιβλίο " (book). "Βιβλίο " is neuter, so "Χρυσό " (gold) is neuter adjective. "Βιβλίο " can also be used as a noun phrase meaning "book case " or "book cover ". If it's a cover, "Χρυσό " (gold) would be used. If it's a noun phrase meaning "book case ", "Θήκη βιβλίου " (book case) would be used. Given "Gold " is an adjective, "Βιβλίο " is more likely used as a noun phrase here. Let's consider the context of the original text. "Gold " is an adjective modifying "Βιβλίο " (book). "Βιβλίο " can mean "book case " or "book cover ". If it's a cover, "Χρυσό " (gold)