Description: Calcite manganese-rich Aranzazu Mine Concepcion del Oro, Zacatecas, Mexico 8 x 3 cm Sweet small cabinet of manganoan calcite from Mexico that I bought from Perk in 1981 for a then-princely $350. I saw it during set up for TGMS but he refused to sell anything before the doors opened the next day. Needless to say I pounced...the interaction was the foundation of our relationship.

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