Opal Cream

Opal

Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous (chemical) physical structure, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.

Cream

Cream is a dairy product composed of the higher-fat layer skimmed from the top of milk before homogenization. The butterfat, which is less dense, rises to the top and is skimmed off, resulting in gravity cream. The industrial production of cream instead uses centrifugal separators to make separator cream. Cream is often sold in grades defined by their butterfat content. It contains high levels of saturated fat, in ascending proportion from light cream to heavy cream.

Cream (colour)

Cream is the color of the cream produced by cattle grazing on natural pasture with plants rich in yellow carotenoid pigments, some of which are incorporated into the fresh milk. This gives a yellow tone to otherwise-white milk at higher fat concentrations. Cream is the pastel colour of yellow, much as pink is to red. By mixing yellow and white, cream can be produced.

opal

Noun

1. A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO2·nH2O.

cream

Noun

1. The butterfat or milkfat part of milk which rises to the top; this part when separated from the remainder.
2. The liquid separated from milk, possibly with certain other milk products added, and with at least eighteen percent of it milkfat.

Adjective

1. Cream-coloured; having a yellowish white colour.