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Gimlet Quarry, Pwllheli, Lleyn Peninsula, Gwynedd, Wales, UK

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Latitude & Longitude (WGS84): 52° 52' 53'' North , 4° 23' 50'' West
Latitude & Longitude (decimal): 52.88162,-4.39737
UK National Grid Reference:SH387343
Other/historical region names associated with this locality:Caernarvonshire

Fine specimens of glassy to milky analcime crystals to 25 mm across coating quartz and apophyllite with pectolite are held in the National Museum of Wales collection. Fleshy pink stevensite also extensively coats or totally replaces pectolite here. The specimens were obtained through the purchase of the collection of G.J. Williams, the former H.M. Mine Inspector for North Wales, in 1927.

Additionally, Harrison (1897) described prehnite associated with quartz, calcite, natrolite and brookite from joint planes in the Carreg yr Imbill dolerite intrusion.

Gimlet Quarry has been in-filled and material is no longer collectable here.

W. Jerome Harrison, Jr. (1897): An Occurrence of Prehnite in Wales. Mineralogical Magazine 11, 198-198.

Mineral List

8 valid minerals.

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