What is the significance of having built stone mansions?
Amos 5:11 (ESV)
11Therefore because you trample on the poor and you exact taxes of grain from him, you have built houses of hewn stone, but you shall not dwell in them; you have planted pleasant vineyards, but you shall not drink their wine.
Stone mansions were very expensive. Only the rich could afford to build them. Their riches were built on the backs of exploiting the poor.
11 Therefore because you trample on the poor and you exact taxes of grain from him, you have built houses of hewn stone, but you shall not dwell in them; you have planted pleasant vineyards, but you shall not drink their wine.