The purpose is for the author to make the reader want to read and find out more since most likely the first book ended in a cliff hanger; they want the reader to read more and find out more of what will happen.
Answer:
Because Calcites are fluorescent and glow with an array of vibrant colors under ultraviolet light but will not glow under a desk lamp.
Explanation:
Calcites are flourescent minerals.
Flourescence occurs when UV light reacts with chemicals in a mineral and makes it glow
I have read it a few times