This is a picture of a member of the 1902 Coronation contingent sent from Australia to England.
The uniform is the first 'Australian' pattern and showed some of the attributes of the later 1903 style.
The embellishments are green and white.
The badges were certainly 'Australian Commonwealth Horse', both cap and shoulder types were worn.
More info in my CD on Australian Military Uniforms 1902 to 1918
www.uniformsotw.co.uk/products.htm