The Birthday mica occurrence is located southwest of Pyramid Peak, 78 kilometres north of the community of Germansen Landing.

A mica-bearing pegmatite dike is hosted in an area of mica schists, gneisses and quartzites of the Neoproterozoic Ingenika Group which have been regionally metamorphosed to the kyanite zone of the amphibolite facies. The pegmatite dike is described as being 15 to 60 metres in width, and more than 450 metres long. Although no mica of "commercial" grade was seen in outcrop, "two or three valuable crystals of muscovite" were observed in float (Geological Survey of Canada Summary Report 1927, Part A, page 33A). Refer to the Family Farm occurrence (094C 034), located 8.4 kilometres north, for further details of these regional pegmatite occurrences.

In 2005, Guardsmen Resources Inc. acquired the Mica Peak property, which covers the Birthday showing, in hopes that appreciable rare earth elements may be found in association with pegmatite zones. During a 1996 visit, heavy snowfall limited exploration to stream silt sampling. Unfortunately, exploration in 2007 was limited to the westernmost part of the property. In 2010, Guardsmen Resources Inc. conducted a two-day reconnaissance silt and rock geochemical sampling program; two mineral prospects, Family Farm (094C 034) and Birthday, were briefly examined.