It was pale to medium green and associated with yellow pharmacosiderite and colorless to white gypsum .
The mix we use contains compost, peat, perlite, rock phosphates, blood meal, calcite clay and gypsum .
In each of these settings, progressive evaporation of seawater leads to precipitation of calcite and gypsum followed by halite.
But as the popularity of drywall, sky-rocketed, gypsum plaster fell out of favor.
It is dominated by the deposition of calcite with minor pyrite, marcasite, barite, anhydrite and gypsum .
Do not use mortar-mill type for mixing gypsum plasters.
Colorless gypsum and white pickeringite-halotrichite are the most common efflorescences found on shale.
They are cast in white gypsum and hang on a deep blue wall.
Among the gravels there were shiny crystals of the mineral gypsum , the residue left behind when seawater evaporates.
To neutralize the soil of a bare spot caused by dog urine, pour tomato juice over the area or treat the soil with powdered gypsum .