EX92AM1: Short doubly terminated prismatic Fluorapatite crystal, with very well defined faces and edges, lustrous, and with a distinct geometric color zoning, popularly known in Panasqueira as “olho de boi” (ox's eye), with intense and uniform blue-violet prism faces. On a matrix of Quartz crystals, with lenticular Siderite crystals, Chlorite coatings and leafy Muscovite aggregates. This color is very rare in Panasqueira and more so in pieces of such quality, which are usually old pieces, as in this case.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal

Specimen size: 11.6 × 7.8 × 6.5 cm = 4.57” × 3.07” × 2.56”

Main crystal size: 4 × 2.1 cm = 1.57” × 0.83”