ex. Chuck Houser
A truly bizarre specimen featuring a todorokite crystal, crude and ugly though it is, perched on matrix. Extremely rare and unusual! This crystal may be a replacement of a previous mineral, but we do not know of what.Self collected by Chuck on a grading project in Penasquitos in the late 80's
9.2 x 8.8 x 6.7 cm. Manjiroite and todorokite are RARE to uncommon hydrated manganese oxides. This exceptionally rich and showy specimen consists of bedded, dark gray, lamellar manjiroite altering to todorokite with really neat-looking vugs lined with glassy calcite crystals. Some of the lamellar manganese oxides are chatoyant! A nifty and unusual specimen from the Willy Israel Collection, who purchased this excellent piece from well-known dealer Clive Queit in 1986.
10.7 x 9.1 x 8 cm. An unusual specimen consisting of a mass of foliated manjiroite crystals, altering to todorokite. The cavities are filled with bright glistening calcite crystals! Pretty and unusual! Ex. Willy Israel Collection.
5.4 x 4.0 x 3.1 cm. A classic, old-time and rare pseudomorph and combination specimen from the Corkscrew Mine of Death Valley, California. This superb, two-sided specimen consists of colemanite after sharp, blocky, parallel-growth, inyoite crystals. The fine pseudomorphs, front and back, are completely covered with two colors of brown and tan, sparkly todorokite microcrystals. Todorokite is a very complex manganese hydroxide. This is older material from the 1960s-70s and comes from the Jamie Bird Collection, a California collector from the 1960s-1980s. The blue ink on the accompanying label is characteristic of the 1960s.
16.9 x 12.0 x 8.0 cm. A truly bizarre specimen featuring a todorokite crystal, crude and ugly though it is, perched on matrix. Extremely rare and unusual. This crystal may be a replacement of a previous mineral, but we do not know of what. Self collected by Chuck on a grading project in Penasquitos in the late 1980's. Ex. Chuck Houser Collection.
ex. Martin Zinn
An unusual, organic-looking , stalactiticgrowth of this complex manganese oxide which has the kitchen sink thrown into its chemistry. It is likely that this is the same locality reported on mindat as Ushkatan, mis-transliterated. In any case,a very good example of this complex oxide.
All Content and Design ©1996-2012 The Arkenstone
Powered by http://mineralwebsites.comMineral Specimens by species; or by specimen id.