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Seligmannite: PbCuAsS3
Comments: Lead gray, prismatic seligmannite crystal with brassy yellow pyrite on white dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Crystal size 2 mm. © Walter Gabriel
Seligmannite: PbCuAsS3 Liveingite: Pb9As13S28
Comments: Black prismatic seligmannite crystals with crystalline black liveingite. Location: Lengenbach Quarry, Binnental, Valais, Switzerland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sellaite: MgF2
Comments: Compact, white acicular sellaite crystals. Location: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany. Scale: 21x16x10 mm. © John Betts - Fine Minerals
Selwynite: NaK(Be,Al)Zr2(PO4)4·2(H2O)
Comments: Dark purplish blue crystal of selwynite. Location: A granite quarry near Wycheproof, NW Victoria, Australia.. Scale: Not Given. © Museum Victoria
Semenovite: (Na,Ca)9(Ce,La)2(Fe++,Mn)(Si,Be)20(O,OH,F)48
Comments: Tan crystals of semenovite to 1 mm across on matrix. Location: Ilimaussaq, Tasseq, Greenland. Scale: Picture size 1 cm. © John Veevaert
Semseyite: Pb9Sb8S21
Comments: Crystal clusters of semseyite crystals to 1 cm on sphalerite. Location: Herja, Romania. Scale: Picture size 5 cm. © John Veevaert
Comments: Tabular crystals forming groups and rosettes of gray semseyite with creamy greenish yellow siderite. Location: Herja mine, Maramures Rumania. Scale: 6.5 x 6 x 3.5 cm. © Fabre Minerals
Senaite: Pb(Ti,Fe,Mn)21O38
Comments: Black crystal of senaite. Location: Presidente Kibitschek, Minas Gerias, Brazil. Scale: Crystal size 2 mm. © Dave Barthelmy
Comments: Brownish-black senaite cleavage. Location: Dattas, near Diamantina, Minas Gerais, Brazil. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Senarmontite: Sb2O3
Comments: Perfect octahedral, transparent, light to dark gray senarmontite crystals to 3mm. Location: Djebel Haminate mine, Ain Beida, Constantine, Algeria. Scale: Pictrure size 1.5 cm. © Tom Loomis / Dakota Matrix