White Cliffs is the only place where opalised pineapples can be found. They began life as an Ikiate crystal in the Ice Age. When the ground heated up to 8 degrees the high water content in the crystals melted and they pseudomorphed into another crystal called glendonite. Glendonite was porous and mesh like and over millions of years it was replaced with opal. They are known as a double pseudomorph. Pineapples vary in size and shape, most are potch (opal without play of colour), some are precious opal and some have distinct point formations and some are just undefined blobs.
Glendonite crystal cluster.
Photo: Linda George