The Crown Prince occurrence is located on the east slope of Broughton Range overlooking Effingham Inlet, 24 kilometres east of Ucluelet in Barclay Sound.

The area is underlain by diorite, foliated to gneissic diorite, amphibolite and minor metavolcanic and metasedimentary rocks of the Paleozoic to Mesozoic Westcoast Complex. Recrystallized limestone and minor skarn occur in the vicinity.

The magnetite mineralization is hosted in fine to medium grained, banded and silicified andesitic tuff cut by narrow dykes of fine-grained granite or quartz monzonite. The tuff beds strike east and have a variable north dip.

The showing, on the Sech 2 claim, consists of a body of magnetite striking southeast and dipping north 45 degrees. The magnetite, exposed by stripping and quarrying, has a width of about 10 metres at the surface. North of this, trenching and stripping has exposed a magnetite outcrop which follows the same trend and is possibly an extension of the magnetite body.

A tunnel was driven 15.2 metres through sheared and altered igneous rock. The right side of the tunnel contains a little ore mixed with pyrite and arsenopyrite until solid ore is encountered at 22.9 metres. From this point up to and including the face, the tunnel is in solid ore.

A drift runs diagonally to the left off the tunnel for 19.8 metres, 15 metres from the portal of the tunnel. The first 6.1 metres of the drift is in ore somewhat mixed with rock, not as clean as in the main tunnel, and is probably a continuation of it. The next 6.1 metres contains magnetite highly mixed with rock and pyrite. The remaining 7.6 metres is in barren rock.

The magnetite occurs as irregular and spotty replacement of the tuff beds associated with considerable garnet and metamorphosed tuff. The gangue consists of silica, garnet and epidote. It is believed that the magnetite originated by replacement of bedded tuffs under the influence of an intrusive magma.

Inferred reserves (quoted as proven, grade not stated) are 67,500 tonnes grading 50 per cent iron. (Annual Report 1916, page 291). Not well-defined reserves. Another 180,000 tonnes is possible.

A geochemical survey done in 1984 revealed no arsenic, gold or mercury anomalies (Assessment Report 12196).