Assertion: opal | /r/HasProperty | amorphous
Facets:
value: with no crystalline structure
type: OTHER
value: with a water content
type: OTHER
value: singularly
type: DEGREE
value: depending on the porosity
type: OTHER
value: scientifically
type: MANNER
Source sentences:
text: Opal is amorphous with no crystalline structure.
text: Scientifically, opal is amorphous silica (SiO2.nH2O) which is solidified from liquid silica.
text: Opal is an amorphous form of silica, chemically similar to quartz, but containing 3% to 21% water within its mineral structure.
text: Singularly, the opal is amorphous which means it does not have a defined crystal arrangement
text: Opal is amorphous with no crystalline structure.
text: Being amorphous, opal is isotropic under the microscope.
text: Crystal System: Does not apply because opal is amorphous .
text: Opals are unique among precious gems because they do not take a regular crystalline shape but are instead amorphous.
text: Opal is amorphous silica with a water content varying from one to twenty percent, depending on the porosity and degree of hydration.