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Mourne Mts, Co. Down, Northern Ireland, UK

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Detailed Mineral List:

Albite
Formula:	NaAlSi₃O₈
Reference:	F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)
Localities:	Recorded from at least 2 other localities in this region.






Anorthite
Formula:	CaAl₂Si₂O₈
Reference:	F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)







Anorthite var: Labradorite
Formula:	(Ca,Na)[Al(Al,Si)Si₂O₈]
Reference:	F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)







'Apophyllite'
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK








Beryl
Formula:	Be₃Al₂(Si₆O₁₈)
Reference:	No reference listed
Localities:	Recorded from at least 3 other localities in this region.





Photo: © Stephen Moreton. Beryl from Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK
Beryl var: Aquamarine
Formula:	Be₃Al₂Si₆O₁₈
Reference:	UKJMM Vol.29 p.21






Photo: Aquamarine from Mourne Mts, Co. Down, Northern Ireland, UK
'Biotite'
Locality:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK








Calcite
Formula:	CaCO₃
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







Chabazite-Ca
Formula:	(Ca,K₂,Na₂)₂[Al₂Si₄O₁₂]₂ · 12H₂O
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







Chamosite
Formula:	(Fe²⁺,Mg)₅Al(AlSi₃O₁₀)(OH)₈
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







Danalite
Formula:	Fe²⁺₄(Be₃Si₃O₁₂)S
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







'Feldspar Group'
Localities:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK Slieve Bearnagh, Mourne Mts, Co. Down, Northern Ireland, UK








Fluorite
Formula:	CaF₂
Localities:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Dr Richard Unitt. Fluorite from Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK
'Gadolinite'
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK








Heulandite-Ca
Formula:	(Ca,Na)_2-3Al₃(Al,Si)₂Si₁₃O₃₆ · 12H₂O
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







Magnetite
Formula:	Fe²⁺Fe³⁺₂O₄
Locality:	Pigeon Rock Mountain, Mourne Mts, Co. Down, Northern Ireland, UK







'Mica Group'
Localities:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Slieve Bearnagh, Mourne Mts, Co. Down, Northern Ireland, UK








'Monazite'
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK








Muscovite
Formula:	KAl₂(AlSi₃O₁₀)(OH)₂
Localities:	Slievenamiskan, Spelga, Mourne Mts, Co. Down, Northern Ireland, UK Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Dr Stephen Moreton. Muscovite from Slievenamiskan, Spelga, Mourne Mts, Co. Down, Northern Ireland, UK
Opal var: Opal-AN
Formula:	SiO₂ · nH₂O
Locality:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK







Orthoclase
Formula:	KAlSi₃O₈
Localities:	Pigeon Rock Mountain, Mourne Mts, Co. Down, Northern Ireland, UK Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Dr Richard Unitt. Orthoclase from Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK
Prehnite
Formula:	Ca₂Al₂Si₃O₁₀(OH)₂
Reference:	F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)







Quartz
Formula:	SiO₂
Locality:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: Quartz from Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK
Quartz var: Smoky Quartz
Formula:	SiO₂
Localities:	Slievenamiskan, Spelga, Mourne Mts, Co. Down, Northern Ireland, UK Pigeon Rock Mountain, Mourne Mts, Co. Down, Northern Ireland, UK Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Slieve Bearnagh, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Dr Richard Unitt. Smoky Quartz from Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK
Saponite
Formula:	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







Schorl
Formula:	Na(Fe²⁺₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Locality:	Pigeon Rock Mountain, Mourne Mts, Co. Down, Northern Ireland, UK







Siderophyllite
Formula:	KFe²⁺₂Al(Al₂Si₂O₁₀)(OH)₂
Localities:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Greisen vein outcrop, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK







'Stilbite'
Reference:	F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)








Stilbite-Ca
Formula:	NaCa₄[Al₉Si₂₇O₇₂] · nH₂O
Locality:	Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Steve Rust. Stilbite-Ca from Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK
Titanite
Formula:	CaTi(SiO₄)O
Locality:	Slievenamiskan, Spelga, Mourne Mts, Co. Down, Northern Ireland, UK







Topaz
Formula:	Al₂(SiO₄)(F,OH)₂
Localities:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK Lindsay's Leap, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK Greisen vein outcrop, Newcastle, Mourne Mts, Co. Down, Northern Ireland, UK






Photo: © Steve Rust. Topaz from Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK
'Tourmaline'
Formula:	A(D₃)G₆(T₆O₁₈)(BO₃)₃X₃Z
Localities:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK Slieve Bearnagh, Mourne Mts, Co. Down, Northern Ireland, UK







'Zinnwaldite'
Formula:	KLiFe²⁺Al(AlSi₃O₁₀)(F,OH)₂
Reference:	[Specimen in the Natural History Museum, London]







Zircon
Formula:	ZrSiO₄
Locality:	Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland, UK

34 entries listed. 21 valid minerals.

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