RARE Nipomo Marcasite Rough Chunk! Turritella but when cut the other

but when cut the other way

These cut some excellent slabs and can make some stunning display pieces or cabochons once cut

They can range in sizes

I believe this may have been from Washington State

it will appear mostly black

RARE Nipomo Marcasite Rough Chunk! Turritella but when cut the otherNipomo Marcasite is an old stock form of lapidary grade Iron in Quartz from near Nipomo, California. It is a fantastic material to work with, with its iron based plumes and clear quartz agate. It tends to be pretty solid and takes an excellent polish. It is well known for working into some captivating designer grade cabochons. It was a very popular old stock material, but has long since been tapped out. Sadly, on the modern market, there is very