Sphalerite on Siderite drill bit twin Specimen # BOL711B34

Specimen # BOL711B34

the piece does have a bit of damage on both sides

and one of the best pieces from the find that I've handled

hence the reduced priced

Sphalerite on Siderite drill bit twin Specimen # BOL711B34From my own personal collection, this cabinet sized display specimen is a quintessential Gilman sulfide carbonate association piece. Several remarkably sharp AND lustrous crystals of jet black Sphalerite with notably SMOOTH faces hardly any striations at all on many faces are gently intermixed and sitting atop a crystallized plate of soft beige cream colored compressed rhombohedra or discs of Siderite. The piece was mined in 1978, and I actually