Inktober 2018 day 9: "Precious"

My drawing for the Inktober 2018 day 9 prompt "Precious" gives us the simple scenario of the most valuable treasure being the least assuming one.

Text is:
"Only a trained eye could discern the most valuable thing amidst the other treasures.
The simple wooden cup holding the gems granted eternal youth if dranken from."

-Stella