SPI Minerals Group

	Element	%		Oxide	%		pyrope
	O	44.30							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 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). Locality: Monastery Mine, South Africa
	Mg	11.66		MgO	19.34
	Al	11.28		Al2O3	21.31
	Si	19.38		SiO2	41.46
	Ca	3.32		CaO	4.64
	Ti	0.70		TiO2	1.17
	Cr	0.39		Cr2O3	0.57
	Mn	0.21		MnO	0.27
	Fe	8.67		FeO	11.15
	Sum	99.9		Sum	99.9

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Name	Description	SPI #	Each
Pyrope	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1300-AB	$199.56