I have been wondering about what the stuff is that grows in the colloidal gold. Whatever it is, it looks organic. Recently I had noticed when grabbing my bottle of .05 mol sodium citrate "premix", that there were fuzzy jellyfish looking things floating around in my premix. It looked somewhat similar to the forms that were growing in the colloidal gold (when left at room temperature for more roughly 2weeks).
Today, I was going through old experiment bottles that had different buffers and stabilizers that were archived for a "shelf life" test. One of the bottles was formulated using gold chloride with sodium hydroxide as a buffer to initiate the cinnamon extract. This bottle has been sitting for over one month with not the slightest sign of growth.
I am now questioning the possibility of whether or not its the citrate alone that is responsible for this growth. Even a bottle of sugar water with the lid on tight will not grow something this consistently and this quickly.