Answer:
One am I, among six others: Largest, smallest, cold, dark and two brothers
What has holes on each side, but can still can hold water?
What has four fingers and a thumb but is not alive?
An artΒ-form and its colourful result.
Where jewelry pierces your head.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.