Welcome to Pyramidia -- Online information repository for the pseudomorph known variously as Pyramidite, Glendonite, Thinolite, Gennoishi and others (see below). All of these are calcite pseudomorphs after ikaite. The website Pyramidia is operated by Leo Scarpelli, a person who seems to be completely obssessed with calcite pseudomorphs after ikaite.

Ikaite incorporates water molecules while crystallizing, and can only form in very cold temperatures. When the matrix, usually a silaceous mud, encasing the ikaite crystals warms, as a result of ground movement or climate change, the Ikaite crystals collapse back into an aqueous solution, which then over time re-crystallizes as calcite, filling the void left by the collapsed Ikaite and reproducing its form pseudomorphically. Cool huh!

Glendonite - PyramiditeIkaites and the pseudomorphs replacing them are currently of intense interest to climatologists and other climate researchers, as the crystals reveal information about environmental conditions during their formation. By understanding what the climate has done in the past, scientists are better able to comprehend current conditions. Thus, calcite pseudomorphs after ikaite are quite useful, and their value to science will likely increase as climate change continues to reshape our environment.

The replacement pseudomorphs of Ikaite are named
according to their locations, as follows:
Glendon, New South Wales, Australia
SW USA - [Greek, "thinos" = shore]
Jarrow, United Kingdom
Bay of Fundy, Canada
Niigata Prefecture, Japan - [ = "hammerstone"]
German = barley-corn
Mors Island, Denmark - [ = "Mole Cross"]
Olympic Peninsula, North America
White Sea Hornets
Olenitsa River, White Sea Coast, Karelia, Russia

Ciao amici italiani mio! Cerchiamo di pietre scambi!

Bienvenido a Todos Aquellos interesados en Glendonite!

Greetings all Rockhounds in Australia and
New Zealand! Let's trade rocks!!

Hallo mijn Nederlandse vrienden!
Laten we de handel rotsen!

Giant Aussie Glendonite at the Ballarat & District Gem Club