What is jewellery‎?‎ This new publication is a reflection on that question‎.‎ Here is an interdisciplinary approach transcending the familiar categories crafts or art‎,‎ applied or fine‎.‎ What matters here is exploring what jewellery is ‎- not what it looks like‎.‎ ‎"‎Thinking Jewellery‎"‎ is the distilled result of a colloquium with the same title that has been jointly hosted since 2005 by the Idar‎-Oberstein course in gem and jewellery design by Trier Polytechnic and the city of Idar‎-Oberstein‎.‎ Each year in May more than a hundred jewellery designers‎,‎ students and academics from all over Europe convene in Idar‎-Oberstein to conduct a comprehensive discourse without boundaries on the theoretical foundations of jewellery‎.‎ This publication contains the most interesting lectures given over the five years since major artists in jewellery‎,‎ distinguished ethnologists‎,‎ philosophers‎,‎ psychologists‎,‎ cultural anthropologists‎,‎ and scientists instituted the Colloquium‎.‎ Lavishly illustrated to showcase the objects discussed‎,‎ it documents the standards so spectacularly achieved by the Idar‎-‎.‎‎.‎‎.‎