赤金 is read as あかきん (akakin) and means red gold.
あかきん
akakin
あこうしんようきんこ
Akaho Shinkin Bank
あかがねこう
akaganeite
きんあか
bronze-red
きんあかいろ
bronze-red (colour, color)
あかいろ
communism
あかい
Red
あかじ
corrections (by a teacher or proofreader) written in red
あかちゃん
baby
せきどう
equator
せきはん
red rice (beans and mochi) for auspicious occasions
あかつち
dark-red paint
あかご