A wood substitute in the ancient environment: By way of example, when Wooden turned scarce due to deforestation on Bronze Age Crete, gypsum was used in building design at areas exactly where Wooden was Beforehand utilised.[42] Agates: A form of quartz that forms in volcanic rock. They are available in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050