#356 Buergerite Mexquitic Mexico (1984) FOV:16 mm
Member of tourmaline family
#50 Conichalcite Mexico (1981) FOV:4.8 mm
Another specimen I purchased in 1981 for $1.00
#2389 Cassiterite (needle tin) Ichocollo Mine Llallagua Potosi Bolivia (2004) FOV:16 mm
I remember seeing needle cassiterite an a museum years ago and to my surprise I have a small thumbnail specimen. For a single metal oxide, cassiterite is a amazing mineral
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