Assertion: tourmaline's color | /r/CapableOf | arise in the diamond crystal structure
Facets:
value: from nickel
type: OTHER
value: from hydrogen
type: OTHER
value: from nitrogen
type: OTHER
value: from defects in the crystal structure
type: OTHER
Source sentences:
text: These colors arise from nitrogen, hydrogen, and nickel in the diamond crystal structure or from defects in the crystal structure caused by irradiation as the diamond forms underground.