It would barely be visible on a bookshelf. 1kg of gold is about the size of a large smartphone🤷🏻♂️.
Discussion
Not an unsolvable problem.

Now a Kg of gold (ON A BOOK-END), that'd be cool👌🏻.
It would barely be visible on a bookshelf. 1kg of gold is about the size of a large smartphone🤷🏻♂️.
Not an unsolvable problem.

Now a Kg of gold (ON A BOOK-END), that'd be cool👌🏻.