Chips
3/8" Chips. Very small stones
Blocks
A much bigger block with a cavity/hole going through the center.
Bags
An empty big bag.
Regular 4" block with a 90 degree offset.
Concrete block that weighs one tonne.
Gravel
Screenings-Very dusty gravel
The bigger thicker blocks up from the 4"
Quarry Products
Plastering sand
Regular 4" block with a 30 degree offset.
Clause 804
Aggregate mix