the answer is ( i think...) capstone.... or mastaba wichever fits in your crossward puzzle!
A stone pyramid
A typical stone block used in the construction of the Great Pyramid of Giza would weigh around 2.5 tons on average. However, the exact weight can vary depending on the size and location of the stone within the pyramid.
The answer depends on which pyramid. Geometrically, one stone makes a pyramid - a trivial one. Four make a proper pyramid.
small pyramid on topAdded: The capstone.
If you mean the Great Pyramid it is Khufu
There are thirteen rows of stone in the pyramid on the dollar bill.
Stone blocks
Stone
stone
The 'capstone' or 'pyramidion'.
Capstone or pyramidion
it is made of stone, hence the word stone.