Hall C1 is the »gemstone hall« at inhorgenta europe 2010. Here, the gemstone industry of Idar-Oberstein is presenting modern gemstone designs and precious and rare stones from the past through to the present day as part of various exhibitions. Curator of the German Gemstone Museum in Idar-Oberstein, Manfred Wild, has put together a unique collection of objects and engravings for visitors at inhorgenta europe 2010 to admire to mark the 150 year anniversary of the museum. A ruby Siddharta, for example, sits serenely in a crystalline lotus flower admiring the display cases around him. These include agate toads, containers made from finely cut agate, opals or beryl. A historic snuff tin from the collection of the Saxon Duke Anton Ulrich is also included. The sophisticated engravings of the Idar- Oberstein gemstone artists are represented with a selection of modern and historic gemstones and engravings. Prize-winning items by German jewellery and gemstone designers complete the scope of this exhibition which gives visitors an impression of the beauty of the exhibits present in the Idar-Oberstein Gemstone Museum. The second special exhibition features jewellery designs with a touch of innovation. Students from the Idar-Oberstein and Lappeenranta (Finland) Colleges of Design gathered together at a workshop in Finland as part of the »Stone Matters II« collaborative project and the results of this project are displayed here. The project focused ambiguity since »Stone Matters II« can be interpreted both as »matters made from stone« and »stone which matters«. During the workshops led by Theo Smeets and Eija Mustonen , the young designers also designed the innovative trade fair stand. Their creations are displayed on rubber tyres distributed and hanging across the area.