Ludlamite

Ludlamite (unique sphere-shaped aggregate) Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia Specimen Size: 3.5 x 2.7 x 2.1 cm (miniature) Ludlamite Group: 8 mm © minclassics

Chemical Formula: (Fe,Mn,Mg)3(PO4)2·4H2O
Locality: Wheal Jane, Kea, near Truro, Cornwall, England, UK.
Name Origin: Named for Henry Ludlam (1824-1880), English mineralogist and collector.

Ludlamite is a rare phosphate mineral with formula: (Fe,Mn,Mg)3(PO4)2·4H2O

It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).

History

Discovery date : 1877
Town of Origin : WHEAL JANE (MINE), TRURO, CORNOUAILLES
Country of Origin: ANGLETERRE

Optical properties

Optical and misc. Properties : Transparent to Translucent
Refractive Index: from 1,65 to 1,69
Axial angle 2V : 82°

Physical Properties

Cleavage: {001} Perfect, {100} Indistinct
Color: Apple green, Colorless, Green, Greenish white, Light green.
Density: 3.15
Diaphaneity: Transparent to Translucent
Hardness: 3.5 – Copper Penny
Luster: Vitreous (Glassy)
Streak: white

Photos :

Ludlamite Blackbird Mine, Lemhi Co., Idaho, USA Size: 2.8 x 2.5 x 0.6 cm (thumbnail) © danweinrich
Ludlamite Stari Trg Mine, Trepča complex, Trepča valley, Kosovska Mitrovica, Kosovo Specimen weight:25 gr. Crystal size:Up to 3 mm Overall size: 35mm x 27 mm x 25 mm © minservice
Ludlamite Huanuni Mine, Huanuni, Dalence Province, Oruro Department, Bolivia Size: 3.0 x 2.0 x 1.5 cm (thumbnail) © danweinrich
San Antonio Mine (San Antonio el Grande Mine), East Camp, Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico © fabreminerals
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