Arsentsumebite (illustrated as Tsumebite) - image 1

Arsentsumebite (illustrated as Tsumebite) - image 2

Arsentsumebite (illustrated as Tsumebite)

Unknown Owner

Help improve this recordNo owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.

A rich specimen of dark emerald-green arsentsumebite from the type locality. A corner of the piece contains a clustering of numerous <0.5mm scintillating crystals with the remainder of the piece complimented by rich coatings and veinlets of this lead copper arsenate-sulfate. The color is so dark, that it is easy to see why it was assumed to be tsumebite, 30 years ago. This piece was featured in "The F. John Barlow Mineral Collection" as tsumebite (illustrated on page 307!); however, subsequent analysis upon our acquisition of the piece revealed it to be arsentsumebite. An important (mis)figured specimen of a very rare species.