It's more that he came from such wealth that his family could acquire a nontrivial share in an emerald mine on what amounted to a whim.
> Standing with the cash in his hand, Errol was made another offer he couldn't refuse: Would he like to buy half an emerald mine for half of his new riches?
> "I said, 'Oh, all right'. So I became a half owner of the mine, and we got emeralds for the next six years."