For every 6, pass one quarter to the person on your right. 7. Roll for the center pot. When only one person is left holding quarters, he or she must roll for the center pot. 1  The player must roll a 1, 2, or 3 to win the pot. 2  If the player rolls a 4 and only has one quarter left, that quarter must go into the center pot.
Magnetite and other heavy minerals (dark) in a quartz beach sand (Chennai, India). Magnetite is sometimes found in large quantities in beach sand. Such black sands (mineral sands or iron sands) are found in various places, such as California and the west coast of the North Island of New Zealand.
Main article: Apparent polar wander. The magnetic poles are relatively stationary in position over time and because of this, researchers often use magnetic minerals, like magnetite, in order to find at what latitude the continent was positioned relative to the magnetic poles of that time.