Aragonite is named after a place, and almost everyone gets the place wrong.
Abraham Gottlob Werner named the mineral in 1797 after Molina de Aragón, the Spanish village where it was first properly described. Later writers assumed he meant the region of Aragón and repeated it often enough that the mistake is still in circulation today. The village is in Guadalajara, in Castile-La Mancha, and is not in Aragón at all.
This slice formed a long way from either, in karst cavities in the limestone at Ighoud in western Morocco. The name travels with the mineral, not with the ground it came out of.
Carbonates are soft. Keep it dry and dust rather than wash.
Mineral: Aragonite (calcium carbonate, CaCO₃)
Crystal system: Orthorhombic
Origin: Ighoud (Irhoud), Youssoufia Province, Morocco
Hardness: 3.5 to 4 on the Mohs scale, soft and easily marked
Treatment: Cut and polished, no dye or heat
Dimensions: 6.93 x 1.33 x 5.93 cm
Weight: 77.86 g
You will receive the exact piece photographed.