Answer:
I am a time for gathering crops. Remove the first three letters and I become an object you can wear.
I can never be stolen from you. I am owned by everyone. Some have more some have less.
What happens when you throw a green stone into the Red Sea?
What kind of table can you eat?
Why is it so easy to weigh fish?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.