Toward Ecosophy

Agalmata are a late Neoplatonist invention -- you can find them discussed in some of Proclus's writings, and also in the Hermetic literature in the Asclepius. Since the old temples were being looted and burnt by Christian mobs at that time, Pagans had to work out ways to replace the ancient images of the gods, which had beeen worshipped for centuries and had a great deal of spiritual energy in them. Agalmata were the answer. An agalma is a divine image that's filled with things that resonate with the divine influence invoked into the image -- for example, solar stones, herbs, resins, etc. in an image of Apollo, Mercurial objects in an image of Hermes, and so on. They can be created and used for any deity you like -- Neoplatonism is syncretic, and can be adapted to pretty much any tradition.