Java island, Donorojo area is the origin of these agates. Usually they are coloured yellowish-brown or creamy-white. Blue and red colours (carnelians) do occur too. Those agate-nodules are showing an irregular shape. They were all wheathered in an lateritic soil (analogue to several brazilian deposits). It is obvious because of their brownish crust . The smoothening of the edges is caused by wheathering too - fluvial influences are not visible on the surface of these nodules.
Indonesian agates are sometimes showing a fine spherulithical pattern and fortification banding. The banding of these agates is usually wide and soft, not as sharp and finelined as similar specimen from Madagascar or Brazil. Sometimess “water-level-agates” do occur too.