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Use "sienite" in a sentence
"This is more properly to be called sienite, or syenitic granite, with felspar too abundant generally to make a firm and durable stone."
"Here and there only small rocks of granite, quartz or sienite interrupt the dreary uniformity of the plain."
"They lingered around the rocks in their path, black with fringes of dry sea-weed, and talked of gneiss and sienite, granite and trap; they stopped at the curve in the shore, and sat down to watch the white flitting of sails on the far horizon-line, and somehow, the sight of them led to a long talk about"