Tested as early as 1855, as evidenced by this saucer, gas firing of porcelain would require long years of research: it was not until the middle of the 20th century and the arrival of gas extracted in Lacq (Pyrénées-Atlantiques) in 1959 to definitively seal its use in Limoges. Even today, this fuel is the most suitable for obtaining the 1360°C (minimum) required by the specifications of the geographical indication Porcelaine de Limoges. In 2022, following the war in Ukraine, supply disruptions of Russian gas to Europe heavily impacted the ceramic industry. This crisis illustrates the importance of energy and the need to make visible this concept, which encompasses multiple realities.