1. The New Age practice of surrounding one’s self with crystals has a strong positive effect on ____________.
a. mental health
b. the immune system’s response to illness
c. the prospects for world peace
d. the bank accounts of rock shop owners
2. Which of the following is NOT a way crystals can form?
a. solidification of a melt
b. precipitation from solution
c. solid-state diffusion
d. biomineralization
e. precipitation from gas
f. None of the above are correct.