LOCALITY-MINE			DISTRICT-STATE		COUNTRY
Sierra Nevada/			California		USA
Sacramento Valley

COMPOUND-NAME			ROCK-ORE TYPE		COLLECTION
Ru-Fe-Ox. with 			Placer			(Mertie) BM1982.314
osmiridium

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A: Unpolished grain. SEM-BS. Arrow a: enlarged in B. Arrow b: enlarged in C.
B: id. SEM-BS. White inclusion: Ru-Ir-Os-Fe Ox. Dark ring: Fe-Ti aluminosilicate. 
   Polycrystalline cover: Fe-Si-Al hydrox.
C: id. SEM-BS. White: osmiridium.
D: Same grain, polished. RLM-oil. Light grey: osmiridium. Dark grey: Ru-Ir-Os-Fe Ox.
E: id. SEM-BS, low gain and contrast. Arrow: enlarged in G, H & I (HURL.3)
F: id. SEM-BS, high gain: polycrystalline Fe-hydroxide outer layer now visible.

CODE : Hurl. 2