Corsi Collection of Decorative Stones

view of stone 724

Corsi 724, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 724  
Name and quarry location: Chalcedony, locality unknown  
Geological description: Chalcedony (cryptocrystalline quartz) with small cavities lined with quartz crystals. There is no evidence of agate banding.  
Comments: This sample is a composite of blocks of white translucent chalcedony. Brown areas are a waxy cement or polishing compound.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 5. Agate  
Corsi's text: 138.2 Calcedonia  

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