Replication Data for: Crystals auctions in 1923

Title: Historical Market Data on Minerals (1923). Description: This dataset (dataset_final_econometrie.csv) is derived from the archival records of the “Brodu” auction (Gemstones and Modern Antiques: Intaglios and Cameos), held at the Hôtel Drouot in Paris in April 1923. It constitutes the historical component of the study, illustrating a market in which minerals are valued primarily as artistic supports (glyptic art) and as objects associated with cabinets of curiosities. Data Structure: The file contains 82 auctioned lots, structured to allow direct comparison with the contemporary market: Transactional Variables: Original hammer prices (1923 French francs) and converted values (constant/adjusted euros), as well as the original catalogue descriptions. Morphological Characterization (Dummy Variables): Binary encoding of object forms (e.g. Form_Bust, Form_Head, Form_Animal), highlighting the predominance of sculptural form over raw material. Mineralogical Characterization: Identification of the materials used (e.g. Mineral_Carnelian, Mineral_Jasper, Mineral_Sardonyx). Sociological Data: Identification of buyers (e.g. Buyer_Popoff, Buyer_Bacqueville), enabling the reconstruction of the oligopolistic structure of demand (art dealers versus private collectors). Methodology: The data were manually transcribed from the original auctioneer’s records (Paris Archives / Drouot Collection) and enriched through binary categorical classification (0/1) for econometric analysis.