Assertion: mineral's type | /r/MadeOf | quartz
Facets:
Source sentences:
text: The stone materials used were sandstone and laterite; brick had been used in monuments constructed in the 9th and 10th centuries.:210 Two types of laterite can be identified; both types consist of the minerals kaolinite, quartz, hematite and goethite.:211 Differences in the amounts of minor elements arsenic, antimony, vanadium and strontium were measured between the two laterites.:211