specific values. different people/places focus on different values. for example in Shakespeare's time, there is a value of responsibility... Hamlet is expected to answer the questions of death, "To be or not to be" reason why hamlet is so memorable
On the 1969 S penny a doubling of the print makes it very valuable ($35 000)
It's scarcity is the only thing that makes it valuable.
There's nothing special about it. Gold is more or less nonreactive, but that's not a special property. What makes it valuable is its rarity, not its nonreactivity. Mercury is similarly nonreactive, but not nearly as valuable.
It tells the person
IT HAVE pretty birds
Its maid of real copper
In the middle ages salt was very rare and valuable, so a person "worth their weight" was a person who was needed and valuable.
what makes it so valuable is because it purifies the intoxicated air. Also it produces lots of drinkable water and everyday needed products
Gold is more valuable than silver. durr.
it is valuable because gold is easy to spot and it is so shiney that it makes people risk their lives just to get it
Its maid of real copper
The tusk is rare and difficult to obtain.