The diamond is a woman, yes...the singer is saying to choose someone to love that has the ability to value something precious and treat it well.
Also, "love was overrated in my time" he is saying love is a feeling and is fleeting and it takes more than love to make a relationship work long term - it takes honesty, selflessness, etc
So, yeah overall he's saying to women, "find a man who can value you, and has integrity in his life overall, and not just feelings towards you at that moment"
The diamond is a woman, yes...the singer is saying to choose someone to love that has the ability to value something precious and treat it well.
Also, "love was overrated in my time" he is saying love is a feeling and is fleeting and it takes more than love to make a relationship work long term - it takes honesty, selflessness, etc
So, yeah overall he's saying to women, "find a man who can value you, and has integrity in his life overall, and not just feelings towards you at that moment"