 Ruby-bearing metasomatic zones typically formed along the amphibolite hangingwall contact of the chromite bearing and cumulate-layered Fiskenæsset anorthosite complex in close proximity to altered ultramafic rocks.Individually, ruby-bearing zones can measure up to 20 metres in thickness and up to 200 metres in length.They may occur as single showings, but are usually found in alignments of multiple showings, with some of the occurrences such as The Ruby Island Line collectively up to 3.5 kilometres in strike length, and as much as 100 metres in width.