This doctoral research has two main goals: to create a collection of compositions exploring the potential of the Sounding Stones, both as a solo instrument and as a new resource to enrich orchestral timbre, and to compose a large-scale work for orchestra, building on the relationship between water and stone as they converge within the natural processes of stalactite and stalagmite growth. A second larger-scale piece accompanies the orchestral one, to show additional interactional scope between the Stones and traditional instruments. This composition portfolio consists of two larger works and seven supplementary pieces. The major work is Speleothemes, comprising four movements: I. 'Stalactite' II. 'Stalagmite' III. 'Joint' and IV. 'Before' The accompanying commentary analyses all the compositions within three categories, namely: - Compositions for Stones - Compositions for Stones and small ensemble - Composition for Stones and orchestra This commentary also examines the aesthetic issues and technical considerations involved in creating the works.