Most of the temples in the Central Angkor region (18 temples) are made out of grey sandstone and
pumas stone (easy to carve). The quarry for the grey stone was located over 60 kms away

"despite the difficulty, stone windows commonly featured lathe-turned balusters"
According to a great book that Glen purchased. Available to read if anyone is interested by the way

'Apsaras''
Female spirit of the clouds and waters
in Hindu and Buddhist mythology
You will see a lot of her throughout this tour