DYOS Tool

Natural Minerals Group

From the standards library of SPI Supplies and the C. M. Taylor Company

# AS1300-AB

Pyrope

Mg3Al2Si3O12
ElementWt % OxideWt %
O 44.30
Mg 11.66MgO 19.34
Al 11.28Al2O3 21.31
Si 19.38SiO2 41.46
Ca 3.32CaO 4.64
Ti 0.70TiO2 1.17
Cr 0.39Cr2O3 0.57
Mn 0.21MnO 0.27
Fe 8.67FeO 11.15
Sum 99.9 Sum 99.9
Loose crystals of pyrope garnet
Locality: Monastry Mine, South Africa
This is a reflected light micrograph of polished, carbon coated pyrope garnet 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 a 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).
Click here for a mineralogical account of everything you might want to know about Pyrope.
Name Description SPI # Each
Pyrope SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1300-AB $
Pyrope SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1305-AB $

# AS5240-AB

Pyrope Garnet

Alternate - either version of this item may be used in our Off-The-Shelf Standards

Mg3Al2Si3O12
ElementWt % OxideWt %
O 45.1
Mg 12.5MgO 20.7
Al 11.4Al2O3 21.5
Si 19.8SiO2 42.4
Ca 3.2CaO 4.5
Ti 0.3TiO2 0.5
Cr 1.3Cr2O3 1.9
Mn 0.2MnO 0.3
Fe 6.6FeO 8.5
Sum100.4 Sum100.3
2mm approx rounded cystals
Bohemia (Wards)
Polished pyrope in T100-19 mount
Name Description SPI # Each
Pyrope Garnet SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS5240-AB $
Pyrope Garnet SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS5245-AB $
   
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