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Despite being ill it's nice that there are little rays of light in my
day.
Pete Carr - Photographer
(Sent on location)
blog: www.vanilladays.com
web: www.petecarr.net
Our former house in Perth - Built on modernist principles as an architect's own abode in 1954, well ahead of its time.
While not the most climate comfortable by today's standards, the passive solar design and generous use of glass helped greatly. The bathroom was more than large enough to develop film in and the sunken garden brought back memories of a bygone era focusing on family and entertainment.
The gypsum in your egg carton will be a variety of gypsum. There are 3 varieties -- Selenite, Satin Spar, & Alabaster. The cover phot for this album is alabaster, as that is the variety most often found in quantities large enough to be called a Rock -- in this case, Rock Gypsum or Gyprock.
CHEMICAL FORMULA - CaSO4 · 2H2O (Hydrous Calcium Sulfate)
CRYSTAL SYSTEM - Monoclinic (3 axes of unequal length, one not at 90 degrees from the others)
HABIT - Clear crystals (selenite), satin spar (fibrous), alabaster (fine-grained/compact massive_
HARDNESS - 2
LUSTER- Vitreous, sub-vitreous, silky, pearly, dull
STREAK - White
COLOR - Clear, white, gray (others possible with impurities)
DENSITY - 2.31-2.32
CLEAVAGE - 3 directions (1 perfect, 2 distinct)
FRACTURE - conchoidal/subonchoidal
OCCURRENCE – Gypsum is an evaporite. It forms in evaporating freshwater and marine basins. It is often associated with other evaporites: glauberite, anhydrite, halite)
Just some of the USES are:
* Sheetrock (Gypboard, Drywall) In fact, because of the water in gypsum, it will act to slow down the progress of fire.
* Additive in Portland Cement to control drying time
* Fertilizer
* Soil conditioner There are various functions, but in the Arizona desert it is used to break up caliche. Gypsum crystals form quickly in wet soil, and that acts to break up the crusty caliche.
* Sculpture (alabaster)
* Plaster of Paris
* Medical: dental molds, plaster casts
* Food Industry: beer brewing, dough conditioner.....
We cannot include every detail about the mineral, so here is a Wikipedia link to get you started on exploration for Gypsum: en.wikipedia.org/wiki/Gypsum
Michele Morbidelli. © All rights reserved. Use without permission is illegal. Website | Facebook | Formspring | Tumblr. THANKS
Me: whacha doing?
Ripley: Umm trying to find something to wear
Me: oh ok..cute stuff in there
Ripley: Thanks