いしづくり
(made of) stone; stone-built
Also written 石作り、石づくり
No-adjective, Noun
橋はしは石造いしづくりだ。
The bridge is made of stone.
「とすると石造いしづくり？」「一般的いっぱんてきなＲＣ造あーるしーぞうよ」
"So it's built from stone?" "It's ordinary reinforced concrete."