Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
granite
|
| gptkbp:chemicalFormula |
NaFe3Al6(BO3)3Si6O18(OH)4
|
| gptkbp:cleavage |
indistinct
|
| gptkbp:color |
black
|
| gptkbp:component |
iron
|
| gptkbp:crystalSystem |
trigonal
|
| gptkbp:discoveredBy |
pre-1400s
|
| gptkbp:event |
metamorphic rocks
granite pegmatites |
| gptkbp:fracture |
uneven
|
| gptkbp:hardnessMohs |
7
|
| https://www.w3.org/2000/01/rdf-schema#label |
Schorl
|
| gptkbp:IMA_symbol |
Sch
|
| gptkbp:luster |
vitreous
|
| gptkbp:namedAfter |
village of Schorl, Saxony, Germany
|
| gptkbp:specificGravity |
3.0–3.2
|
| gptkbp:streak |
brown
|
| gptkbp:subclassOf |
tourmaline
|
| gptkbp:transparency |
opaque
|
| gptkbp:uses |
granite
collector's mineral |
| gptkbp:bfsParent |
gptkb:Cyclosilicates
|
| gptkbp:bfsLayer |
7
|