If man-made diamonds have the same properties as real diamonds, why do you think they are less expensive?

Because they're made by man within a certain period of time.

Explanation:

Real diamonds are not rare as is, it's the picture that has been imprinted into all of our minds that gives them worth. Real diamonds take a long time to make, sure, but they're not rare. Compared to man-made diamonds real diamonds are hard to come by.

salmon were fished in puget sound.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.