The Rachel showing is located 22 kilometres southwest of Nelson. The area has been extensively explored since the 1800's; this vein was discovered in 1954.
The area is underlain by a granodiorite pluton, the Bonnington pluton, of the Lower to Middle Jurassic Nelson Intrusions. The granodiorite is locally cut by aplite and lamprophyre dykes and quartz veins 0.5 to 3.0 centimetres wide generally trending north and dipping steeply. The granodiorite exhibits two sets of jointing.
The Rachel vein is a north-northeast striking "saddle" vein exposed in an adit on the south side of Grassy Mountain. The vein is 10 to 40 centimetres wide over a strike length of 25 metres and follows the 2 sets of joints to their junction. The vein comprises quartz with lenses and disseminations of galena, free gold as flakes and traces of pyrite. A zone of argillic alteration occurs adjacent to the south side of the vein, and some chloritization and sericitization occur in the wallrock.
In 1980, Kimberley Gold Mines removed 14 tonnes of high grade ore from the adit, yielding an average assay of 66.64 grams per tonne gold, 271.5 grams per tonne silver, and 9.42 per cent lead (Assessment Report 19021). A grab sample taken in 1989 from the middle of the adit assayed 174.5 grams per tonne gold, 331.5 grams per tonne silver and 10.05 per cent lead (Assessment Report 19021).
An extension of the west limb of the vein is exposed 15 metres to the west of the adit. A grab sample taken in 1984 assayed 4.94 grams per tonne gold, 65.13 grams per tonne silver, 2.42 per cent lead (Assessment Report 19021).