The Mineralization of the Llanrwst
Orefield, North Wales
Randolph Haggerty
The Llanrwst orefield comprises lead-zinc veins hosted in Ordovician
volcano-sedimentary rocks, and shares many features in common with other
British pre-Carboniferous vein deposits. This study investigates the style
of mineralization, mineralogy and geochemistry of the orefield.

Parys Mountain
The Type locality for anglesite
Malcolm Southwood
Richard Bevins
In the late eighteenth century, numerous fine specimens of anglesite
were collected from the copper mines at Parys Mountain. It was from this
material that Beudant characterised the species in 1832.

The Great Opencast or Parys Mine, looking east.

Mineral Notes
Erionite from Edinbane, Isle of Skye, Scotland
Ken D. Savage
Bismutite from Penberthy Croft Mine, St. Hilary, Cornwall
Steve Rust
Correction: Powellite from Coire Buidhe, Argyll
Roy Starkey
Cabonate-Cyanootrichite from Wedding Cave Mine, Bwlchgwyn,
Clwyd
David I. Green
Laurionite from Nantycagl Mine, Ceulanymaesmawr, Dyfed,
Wales
Steve A. Rust

Supergene minerals including exceptional
ramsbeckite from Penrhiw Mine, Ystumtuen, Dyfed.
John S. Mason
David I. Green
Fieldwork at this recently discovered locality has revealed an unusual
suite of secondary Cu-Zn-Pb minerals, including abundant crystalline ramsbeckite,
schulenbergite and posnjakite. Excavations were made in undisturbed dump
material allowing the secondary paragenesis to be thoroughly investigated.

Radiating prismatic linarite crystals to 2 mm in length.
John Mason specimen (JMPR 553). Photo: David Green.

Crystallized Enargite from the
Gregory Mine, Ashover, Derbyshire
Mick Cooper
Enargite is reported from Gregory Mine, Ashover, Derbyshire, on specimens
preserved at Chatsworth House. This is the first record of enargite from
the Derbyshire Orefield, and the first record of crystals of enargite
from Britain.

Supergene minerals from Waterbank
Mine, Ecton, Staffordshire.
Steve A. Rust
Waterbank mine on Ecton Hill has produced a diverse suite of supergene
minerals including the rare species namuwite, posnjakite, ramsbeckite
and schulenbergite

Dark blue linarite crystals to 1.5 mm. Steve Rust collection.
Photo: David Green.

Book Reviews
The Complete Book of Micromounting
by Quintin Wight (1993)
Mick Cooper
Mines of the Gwydyr Forest. Part 5. Coed Mawr Pool,
Cyffty and Other Mines
by John Bennett and Robert W. Vernon
Damian J. McCurdy
Minerals, an illustrated exploration of the dynamic
world of minerals and their properties
by George W. Robinson
Mick Cooper
Tresor du Museum, Cristaux Precieux, Gemmes et Objets
d'Art by Henri-Jean Schubnel and Pierre-Jacques Chiappero
Mick Cooper
Zeolites of Victoria
edited by W.D Birch (1989)
David I.Green
Bocamina Magazine of mineralogy and mineral deposits
of Spain. Issue 0: (1994)
Peter Briscoe

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