Image credit: Péter Komjąhy
Copyright: © BTM Aquincum Museum
Image credit: Péter Komjąhy
Copyright: © BTM Aquincum Museum
Image credit: Péter Komjáthy
Copyright: © BTM Aquincum Museum
BTM, Aquincum Museum, Inventory number 51464 (A3.) Image credit: Péter Komjáthy
Copyright: © BTM Aquincum Museum
Gold ring with an amethyst intaglio, the letters E & T behind the emperor’s head. Early 3rd century, from Aquincum, Roman cemetery.
BTM, Aquincum Museum, Inventory number 51464 (A3). Museum record
Images credit: Péter Komjáthy Copyright: © BTM Aquincum Museum
Gold necklace with an amethyst intaglio found in Urbinisi village, district of Kareli © Museum of Georgia 
Roman amethyst intaglio, portrait of Caracalla reworked as Saint Peter. A cross and the inscription were added during the Byzantine era.
Cabinet des médailles
Aquamarine
https://www.khm.at
Caracalla portrait in prase, modern setting.
https://www.hermitagemuseum.org
Cameo, Caracalla dressed as Hercules
Arbeia Roman Fort
Sardonyx cameo The Met 
Chalcedony bust, Musei Vaticani, Biblioteca Apostolica, Museo Profano
source >>
Portraits of the emperor Septimius Severus, and his sons, Caracalla and Geta. 2nd-3rd century carnelian intaglio in the modern setting. https://hermitagemuseum.org 
Sardonyx cameo “Septimius Severus and Julia Domna facing Caracalla and Géta”. Modern setting
Cabinet des Médailles
SOURCES:
Museum of Fine Arts, Budapest [link]