artefact artifact attached attachments belt color colors colour colours commodity-exchange connected contrast contrasting cowrie cowrie-shells cowry craftmanship currency cypraea-moneta Dani-people Dutch-New-Guinea exchange fibers fibres Indonesian-New-Guinea Irian-Jaya money money-belt money-cowry porcelain-like-shells surface surfaces surfacing texture textured textures trade-currency value weave West-Papua woven