So i thought i would offer this up, it is an extremely rare item and in the years i have owned it i have yet to see another one. The history of this item is unknown but it was acquired from a liquidation sale with some other high value items i have had it XRF on the silver parts and it is amazingly pure for native silver. anyone let me present a Musuem Grade Extra Large Crystalline native silver nugget in Calcite Matrix. a quick ebay search sees most crystalline nuggets selling for $20 a gram and more for biger examples as they are just that rare! that puts this item at $4760!!!! my price is $1650 posted express post