The Mo rhodonite occurrence is located 5 kilometres east- northeast of the peak of Orofino Mountain, 18 kilometres northeast of Keremeos, British Columbia and 10 kilometres southeast of Twin Lakes.

The Mo Rhodonite occurrence is located within the Intermontane Belt near its eastern boundary with the Omineca Belt. The Mo occurrence is underlain primarily by a west to northwest striking and 70 to 80 degree southwest dipping sequence of chert and greenstone of the Carboniferous to Triassic Old Tom and Shoemaker formations. The Old Tom rocks include basaltic and andesitic (greenstone) flows dipping steeply to the north, and minor related diorite. The Shoemaker Formation consists of chert, with small amounts of tuff, greenstone, and limestone. To the south and west, these rocks are intruded by Middle Jurassic to Cretaceous gabbroic to granitic rocks of the Nelson and Oliver plutonic complexes and the Fairview pluton. To the north, Eocene Marron Formation basalts are faulted against the older rocks by the easterly trending McCaig Creek fault.

Rhodonite occurs in cherts of the Shoemaker Formation at the Mo occurrence. The rhodonite has been explored by old workings of unknown age. Further to the west at the Orofino Mountain occurrence (082ESW113), rhodonite occurs with quartz as irregular replacement zones in the Shoemaker Formation. The largest lens is 75 metres long by up to 1 metre wide.