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.
As magnetite-bearing igneous and sedimentary rocks form, the magnetite within them is aligned with the Earthâs magnetic field. Since this rock magnetism, called paleomagnetism, does not change after the rock forms, it provides a record of what the Earthâs magnetic field was like at the time the rock formed.ematite is economically the most important iron ore, since it is more abundant than magnetite. Hematite typically occurs as one of two varieties; a massive red earthy form or a black specular variety that has a strong metallic luster. The latter variety may be mistaken for magnetite, but is not magnetic.