Answer:
Break it and it gets better, immediately set and harder to break again.
What has four fingers and a thumb but is not alive?
Nothing specific, but more than a few. This many clustered, together will do.
How many people are dead in a standard grave yard?
An artΒ-form and its colourful result.
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.