Pyrope

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pyrope

[′pī‚rōp]
(mineralogy)
Mg3 Al2(SiO4)3 A mineral species of the garnet group characterized by a deep fiery-red color and occurring in basic and ultrabasic igneous rocks.

Pyrope

 

a mineral of the garnet group; in pure form, magnesium aluminum garnet Mg3Al2[SiO4]3, containing 20.45 percent MgO and frequent admixtures of Fe, Mn, and other elements. Known for its rich, attractive dark red color, pyrope is a characteristic component of certain peridotites, kimberlites, and serpentinites. Transparent blood-red varieties of pyrope are classed as gems. The most well-known pyropes are from the Czechoslovak Socialist Republic, where they occur in basalt breccia detritus, embedded in peridotites, and are extracted from placers. In the USSR, pyrope occurs in the kimberlites (where pyrope is associated with diamond) and eclogites of the Yakutia.

References in periodicals archive ?
The VANZAN Xanthan Gum products and several of the VEEGUM clay products are produced in conformance with the respective National Formulary monographs for Xanthan Gum, Magnesium Aluminum Silicate and Purified Bentonite.
In the water phase, the two gums, magnesium aluminum silicate and xanthan, provide viscosity, while the second item is the preservative.
This TEA stearate emulsion contains glyceryl stearate, carbomer and magnesium aluminum silicate to thicken and stabilize it.
to 100 Magnesium aluminum silicate 1.0 Xanthan gum 0.1 Glycerin 5.0 Aloe vera gel 1.0 Triethanolamine (TEA) 0.8 Mineral oil 9.0 Isopropyl myristate 3.0 Lanolin oil 1.0 Acetylated lanolin alcohol 0.5 Stearic acid 2.1 Glyceryl stearate 3.0 Germaben II 1.0
MAGNABRITE[R]: Magnesium Aluminum Silicates and other highly purified clays for thickener and stabilization of water based formulations.