Pyrope

(redirected from pyropes)
Also found in: Dictionary, Thesaurus.

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 ?
Although diamond inclusion chromites and other indicator minerals had been detected by microprobe before, this is the first time that pyropes have been found on the Shulin Lake property.
heavy ilmenite ("Hil"), heavy pyrope and Cr-diopside
v) potential diamond indicator minerals, such as pyrope ("PPL"),
Four kimberlite indicator minerals consisting of peridotitic pyrope, two possible eclogitic pyropes and one possible chromite were recovered from the concentrates using stereo microscopes.
Samples taken from these pipes were analyzed for diamond indicator minerals and results now received, show the presence of pyropes including G-10 garnets, high sodium and titanium eclogitic garnets, chromites, picroilmenite, perowskite, chrome- diopside and moissanite.
Recent analysis has revealed the presence on these claims of minerals associated with kimberlite, including chromite, olivine G-9 pyropes and diopside.
Recent results from the 1995 sampling indicate the presence of all the "classic" diamond indicator minerals at the Thirsty Lake occurrence, including pyropes, chrome diopside and picroilmenite.
Abundant indicator minerals were recovered from both kimberlites and include pyrope garnets, chromites, picroilmenites, Cr-diopside orthopyroxene and olivine.
Abundant indicator minerals were recovered from both kimberlites, and include pyrope garnets, chromites, picroilmenites, Cr-diopside orthopyroxene and olivine.