Two Fluorapatite crystals with Quartz on Muscovite matrix. The crystals of Fluorapatite, between short prismatic and thick tabular, show a very well-marked geometrical color zoning, deep violet on the central area and clear blue terminations. Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Centro Portugal (1987-2013) Specimen size: 3 × 2.9 × 2.5 cm = 1.2” × 1.1” × 1.0”
Wavellite: Avant Mine, Avant, Garland Co., Arkansas Dimensions 3.4 x 2.0 x 1.1 cm. Thingofinterest: a phosphate mineral with formula Al3(PO4)2(OH, F) 5H2O. WAVELLITE is perhaps the second best known collectable mineral in Arkansas, quartz being the first.
Neat Arsenopyrite with a more golden color than the typical ones. The crystal form is also very interesting. It is a floater, very shiny, and has small crystals of white Dolomite on the rear side. Very pleasant. Minas da Panasqueira / level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Centro Portugal (2004) Specimen size: 11 × 6.5 × 3 cm = 4.3” × 2.6” × 1.2”
Epitaxial Marcasite on parallel growths of sharp Arsenopyrite crystals showing the so-called “key” shape. They are on matrix, with small white Calcite crystals, small Siderite crystals and leafy Muscovite aggregates. Minas da Panasqueira / level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Centro Portugal (1997)