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Ludwigite & Ettringite On Hydromagnesite

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CLB547399

Ludwigite & Ettringite On Hydromagnesite

Classic Locality

Description Tabs

Description
Locality: 
Corcolle, Rome, Rome Province, Lazio, Italy
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.5 × 2 cm
Description

Black acicular ludwigite crystals with microscopic, waterclear and colorless ettringite crystals on balls of hydrocerussite (visual ID). Originally labeled 'breislakite' (which is not known at the locality).

Mineral Data
What's on the rock

Ludwigite

Formula: 
Mg2Fe3+(BO3)O2
Strunz: 
6.AB.30
Crystal System: 
Orthorhombic
Hardness: 
5.0
Type Locality: 
Ocna de Fier (Vaskö-Moraviţa; Vaskö-Moravicza; Eisenstein), Ocna de Fier-Dognecea District, Banat Mts, Caraş-Severin Co., Romania

Ettringite

Formula: 
Ca6Al2(SO4)3(OH)12·26H2O
Strunz: 
7.DG.15
Hardness: 
2.0 - 2.5
Type Locality: 
Ettringer Feld, Western lava flow, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany

Hydromagnesite

Formula: 
Mg5(CO3)4(OH)2·4H2O
Strunz: 
5.DA.05
Crystal System: 
Monoclinic
Hardness: 
3.5
Type Locality: 
Castle Point, Hoboken, Hudson Co., New Jersey, USA

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