Answer:
1 jewel
Step-by-step explanation:
Let's set up a equation
We know that there is one diamond and x numbers of $2160 jewels so we get....
120,000 = 120,000 + 2160 x
0 = 2160x
x = 0
But we have 1 diamond so 0 + 1 = 1
(honestly i think you read the question wrong because 1 jewel seems way too small, reread it and see if you wrote your question correctly)