Which is characteristic of a mineral?

a.
it must be man-made and crystalline.

b.
it must be naturally occurring and crystalline.

c.
it must be man-made and amorphous.

d.
it must be naturally occurring and amorphous.

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature