This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A stone occurring naturally in fields, often used as a building material.

n. A stone found in fields and used for building.

n. stone that occurs naturally in fields; often used as building material

"Many of her details recall both folktales and her Bohemian ancestry – a kerchief, a tunic, a tidy fieldstone cottage encircled by flowers."

stone    rock   

clapboard    tumble-down    vine-grown    stone-built    yellow-brick