Paperweights

The three smallest paperweights in my collection - they wouldn't hold much paper down! To give an idea of the size - they are all standing within an 8cm square, the two spherical ones are 3cm high, the wedge shaped one is 5cm high. 
They are all clear white glass - the Sydney Opera House is etched onto the flat surface and it has a green base. The Lincoln Cathedral is a picture inside, on the blue base.