Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Brianyoungite from
Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:Brianyoungite
Formula:Zn3(CO3,SO4)(OH)4
Comments:Visually indistinguishable in hand specimens from hydrozincite, brianyoungite forms white bladed crystals <0.5mm on cleavage/fractures covering areas to several centimetres on masses of sphalerite sometimes with gypsum
Habit:bladed
Colour:White
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
EPMA
Associated Minerals:
Associates:Bechererite
Cerussite
Associated Minerals Based on Photo Data:
Bechererite1
Schulenbergite1
Data
Mineral Data:Click here to view Brianyoungite data
Locality Data:Click here to view Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:206229
Long-form Identifier:1:3:206229:7
GUID (UUID V4):0
Nearest other occurrences of Brianyoungite
13.1km (8.1 miles) ⓘElgar Mine, Bontgoch (Elerch), Ceulanymaesmawr, Ceredigion, Wales, UK
References
Cotterell, T., Mason, J.S., Green, D.I. (2003) Brianyoungite from Elgar Mine and Frongoch Mine, Ceredigion, Wales. Journal of the Russell Society, 8 (1) 33-34
Rust, Steve A. (2019) Minerals of the Frongoch Mine. Published by the author, 180 pages. ISBN 978-1-9162641-0-6.
 
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