Answer:
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I am a time for gathering crops. Remove the first three letters and I become an object you can wear.
Six letters it contains. Take away the last and only twelve remains. What is the word?
Lovely and round I shine with pale light grown in the darkness a lady's delight.
Whoever made me doesn't want me. Whoever bought me doesn't need me. Whoever uses me doesn't know me. What am I?
What do people want the least on their hands?