- Mineralogy. a black tourmaline.
Origin of schorl
Examples from the Web for schorl
Historical Examples of schorl
On its northern slope is a vast mass of schorl, the celebrated Roche Rock.Nooks and Corners of Cornwall
C. A. Dawson Scott
Some is black with schorl, some, as that of Mill Tor, white as statuary marble.
The black shining matter found near where are veins of tin, is schorl.
The granite is dark red, often inclosing veins of quartz, crystallized and compact, and likewise well-formed crystals of schorl.On the Old Road, Vol. 2 (of 2)
Greisen is closely connected with schorl rock both in its mineralogical composition and in its mode of origin.
- a black tourmaline consisting of a borosilicate of sodium, iron, and aluminium. Formula: NaFe 3 B 3 Al 3 (Al 3 Si 6 O 27)(OH) 4