Siderite (rare locale) Kay Robertson Coll.

Item Description

Striking moderate iridescence highlights this cute intergrown miniature cluster of very sharp brown siderite rhombs. This exceptional and pristine specimen comes from a much less well-known Swiss area and siderite specimens of this quality are VERY RARE. This adorable piece has multiple display views. Choice and rare material from the Kay Robertson Collection # 11287 and acquired in May, 1987. Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record).