MBR89CD5: Scalenohedral Calcite crystal, doubly terminated floater, transparent and extraordinarily lustrous, very rich in perfectly defined faces and edges, and with reddish iron oxide inclusions.
A treasure!
Tonglüshan Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China (2023)

Specimen size: 5.5 × 3.2 × 2.4 cm = 2.17” × 1.26” × 0.94”