'Gold of Ophir' in the Bible

Even three thousand talents of gold, of the gold of Ophir, and seven thousand talents of refined silver, to overlay the walls of the houses withal:

And lay thou thy treasure in the dust, And the gold of Ophir among the stones of the brooks;

It cannot be valued with the gold of Ophir, with the precious onyx, or the sapphire.

Kings' daughters were among thy honourable women: upon thy right hand did stand the queen in gold of Ophir.

I will make a man more rare than fine gold, even a man than the pure gold of Ophir.