Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ruins of León Viejo' has mentioned 'Quartz' in the following places:
Occurrence Sentence Text Source
The presence of stone artifacts is remarkable, as fragments of prismatic knives made of Obsidian (volcanic glass), reported chips of obsidian, chalcedony quartz, wildlife remains corresponding to small mammals, reptiles, birds and fish, part of these materials were associated with the human bones.
Quartz: A fragment was registered in the upper part of an archaeological artifact with anthropomorphic motifs, only displays a part of a face with one of his eyes, made with gray grey.
The totals of quartz stone remains collected are 13, of which 3 were considered as fragments of possible artifacts and 10 are waste (chips).