Gem is a rather indeterminate description for a wide range of precious or semiprecious stones and minerals that are cut and polished for use in jewelry or as ornaments and trinkets. I this chapter the term is used, somewhat arbitrarily, to designate various minerals and stone types that are cut and polished primarily to bring out the beauty and imagery of the stone as such; these are not all gems that are worked into jewelry.They include jasper, a rock type much akin to agate, as well as malachite and opal. Of particular interest in this series is ‘Pietra Paesina’ from Tuscany in Italy, of which several remarkable examples are presented in this chapter. For an explanation see ’Pietra Paesina’ hereunder.


Actual Size Stone Type Copper Carbonate Polished Slab Marine Paint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Dirk J. Wiersam

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