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Rouma Island (Roume; Roma; Ruma), Los Archipelago (Los Islands), Guinea

(Île de Rouma, Archipel de Los, Guinée)

Nepheline syenite with pegmatites.




References:
LACROIX, A. (1908) Sur l'existance du fluorure de sodium cristallisé comme èlèment des syènites nèphèliniques des Îles de Los. Comptes
Rendu, Academie des Sciences, Paris. 146, No.5. 213-216.
LACROIX, A. (1911) Les syènites nèphèliniques de l'archipel de Los et leurs minéraux. Nouvelles Archives du Muséum d'Histoire
Naturelle (Paris), Série 5., 3, 1-132. (in French)
LACROIX, A. (1912) Les syènites nèphèliniques de l'archipel de Los (Guinèe) Bulletin de la Société Française de Minéralogie, 35, 5-44
(in French).
LACROIX, A. (1931) Les pegmatites de la syènite sodalitique de l'Îsle Rouma (Archipel de Los, Guinèe française). Desciption d'un
nouveau minéral (sérandite) qu'elles renferment. Comptes Rendu, Academie des Sciences, Paris. 192, No.4. 187-194. (in French). English abstract: American Mineralogist, 16, (1931) 344.
MOREAU, C. et al. (1996) Can. Min. 34,281-299.
Parodi, G. C., & Della Ventura, G. (1987). Steacyite from the Rouma Isle (Los Islands, Republic of Guinea). Neues Jarbuch fur Mineralogie, Mh., Jg. 1987, H. 5, 233-239





Map Reference: 9°29'5"N , 13°47'0"W

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Mineral List:
Aegirine
Albite
'Albite-Anorthite Series'
Analcime
Apatite-(CaF)
Arfvedsonite
Astrophyllite
Augite
Biotite
Calcite
Cancrinite
Catapleiite
Eudialyte
Fluorite
Galena
Gibbsite
Grossular
Hastingsite
'Hiortdahlite'
IMA2008-024 (TL)
Kupletskite
Låvenite
Leucophanite
Magnetite
Microcline
Molybdenite
Muscovite
Natrolite
Nepheline
Pyrite
Pyrochlore
Pyrophanite
Pyrrhotite
Rinkite
Rosenbuschite
Sérandite (TL)
'Smectite Group'
Sodalite
var: Hackmanite
Steacyite
Titanite
Villiaumite (TL)
Vishnevite
Wöhlerite
Zircon


45 entries listed. 39 valid minerals. 3 type localities (valid minerals).

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