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Willemite and Calcite. Broken Hill, Zambia (Africa)

22.10.2017

Radial brownish Willemite concretions with a 2nd generation growth of white cristals. These fluoresce very bright and willemite has intense and long green phosphorescence. This particular growth of willemite, produces beautiful fluorescence with pretty geometries and contrasts of greens.

Calcite is also present and fluoresce red in Sw.

No appreciable fluorescence in Mw/Lw.

Dimension:  77 x 59 x 49 mm

Weight: 321g

Origin: Excelsior claim, Broken Hill, Kabwe,  Zambia (Africa)

Roccia di willemite sulla quale si aprono due “occhi” di calcite.

La willemite presenta due generazioni di crescita. Sono infatti evidenti delle concrezioni radiali di colore giallo-marrone con riflessi “metallici” e delle cristallizzazioni “bianche”; quest’ultime presentano fluorescenza e fosforescenza incredibilmente brillanti. La fluorescenza (solo in Sw) è dominata dal verde della willemite. La crescita radiale e le due forme di willemite creano venature, disegni e luminosità che rendono particolarmente attraente questo minerale nonostante la quasi totale monocromaticità .

 

Short Wave Uv.

 

 Natural light

 Phosphorescence

Sw Macro: base of the picture is about 20mm

 

Willemite detail with Sw-Dl animation

 

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