RARE Nipomo Marcasite Rough Chunk! Australian Crazy Lace Here is a gorgeous slab

Here is a gorgeous slab of rare old stock Golden Sheen Obsidian

and Morocco

Some chips and smaller chunks also exist in the box

often perfectly solid with minor fracturing

and its high silica content

RARE Nipomo Marcasite Rough Chunk! Australian Crazy Lace Here is a gorgeous slabNipomo 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