On the contrary, no chemical substances have been added to the wine here. In our case, the wine stone is used for decorative objects such as frames - and also serves as a certificate of origin: a piece of the wine stone from each barrel becomes part of the certificate that Pramstaller issues to its DIOGENES NEW LINE objects. The certificate also provides information about the origin, size and year of manufacture of the barrel from which a piece of furniture was made. This allows the owner to trace the long history of the wood from which their unique piece was made.