SPI Supplies

Pyrope Garnet Mg3Al2Si3O12

Locality: Monastery Mine, South Africa

Element%Oxide%
O44.30
Mg11.66 MgO19.33
Al11.28 Al2O321.32
Si19.38 SiO241.45
Ca3.32 CaO4.65
Ti0.70 TiO21.16
Cr0.39 Cr2O30.58
Mn0.21 MnO0.27
Fe8.67 FeO11.15
Sum99.9 Sum99.9
200 µ m
This is a reflected light micrograph of polished, carbon coated pyrope crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This pyrope is one of the so- called "indicator minerals" prized when prospecting for diamonds. In fact this Cr-poor garnet comes from suite of garnets from a diamond mine in South Africa and is typical of a kimberlite association. As can be seen, the crystals are robust, taking a good polish. The name pyrope refers to its "fiery color" (Greek pyro - fire) as can be seen in the mount.
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Cautionary Note
The compositional and other data shown here are intended to convey typical values for this item and do not neccessarily correspond in detail to standard mounts supplied in the past or to be supplied in the future. Items are changed from time to time as stock is exhausted or alternate choices are preferred. These data should, however, give someone contemplating the purchase of an SPI standard a fair indication of what they may expect to receive. Records are kept of all mounts sold so that, should you lose your documentation at some time in the future, we will be happy to replace it at no charge.


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Sunday July 06, 2008
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