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SPECIMEN : QUARTZ/CHLORITE [ETC]
I am presuming the specimen is some form of slag from ore processing
WITH GEMSTONE COLLECTION DOCKET MFG2200
WEIGHT : 72g
WEIGHT : 227g
MASSSIVE CALCITE CRYSTAL ASSEMBLAGE, DURANGO, MEXICO. SUBSTANTIAL 5.1kg MF1547 SPECIMEN : QUARTZ/CHLORITE [ETC]SPECIMEN : CALCITE WEIGHT : 5. 1kg SIZE : 260 x 180 x 100mm PROVENANCE : MAPIMI DISTRICT, DURANGO, MEXICO WITH MINERAL COLLECTION IDENTIFICATION DOCKET MF1547 NOTE : Due to instability of the crystal structure during excavation, the specimen has been stabilised by acid dipping. The piece is now strong and well consolidated. The process does not detract from the natural mineral properties of the specimen.
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