Question 15 which of the following statements about quartz is true? a. quartz does not exhibit fracture. o b. quartz has a fibrous crystal habit. o quartz is softer than most minerals on the mohs hardness scale. od. quartz comes in many different colors

Correct answer D. Quartz comes in many different colors

Explanation:

Depending on the minerals present when the quartz is formed, it can get various pigmentations, If there is iron present quartz can be violet, dark and brown, if there was some form of gas present in the crystal formation it could get a cloudy white-yellowish color, blue pigmentation can be caused to magnesium.

a. Quartz does exhibit a fracture

b. Quartz has a trigonal crystal habit

c. Quartz is one of the hardest materials in Mohs scale.

d. There is a lot of quartz variations in color receiving various names like Amethyst, Cloudy, Smoky, Rose, Blue, and Citrine Quartz

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.