Is Tungsten magnetic? I dropped my boyfriends ring (made of Tungsten) down the place in the doorframe where the door closes, not knowing there was actually a hole there.
Use commas to separate things in a list or series. If you have a series of three or more items, use commas to separate each item. Do not place commas before or after the list or series. Do not use commas when all the items in a series are linked by and, or, or nor.
Commas should be used to separate geographic elements, as in the examples below. The final geographic element should also be followed by a comma when it appears in the middle of a sentence. The mayor of New York was the first guest to arrive; the mayor of Athens, Georgia, was the last to arrive.