Assertion: amber | /r/HasProperty | occluded with bubble
Facets:
value: normally
type: DEGREE
Source sentences:
text: Fossil inclusions are relatively rare, almost always in isolation and usually tiny, and the amber is normally occluded with botanical debris and bubbles; for this reason, fossil specimens are best made viewable in pieces cut to small size prior to polishing, and pictures many times require a trinocular microscope.