Assertion: emerald | /r/CapableOf | traverse folded beds of dark gray
Facets:
value: to limestone
type: LOCATION
Source sentences:
text: According to Latham 65 the emerald here occurs in veins of “semi-decomposed quartz” traversing folded beds of dark gray to black “clay-slate” and limestone, and is found either directly embedded, or in pockets, in these veins, very rarely in the rock itself.