SPI Minerals Group

	Element	%		Oxide	%		almandine
	O	42.01							This is an optical micrograph of a polished, carbon coated almandine garnet crystal taken in reflected light. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Almandine (or almandite) is the iron aluminum end member of the garnets and is a rugged mineral as can be seen from its good polish and prominent relief. Homogeneous garnets are rare so this is a prized material. Locality: New York State, USA
	Mg	6.45		MgO	10.70
	Al	11.67		Al2O3	22.05
	Si	18.32		SiO2	39.19
	Ca	3.00		CaO	4.20
	Mn	0.46		MnO	0.59
	Fe	18.09		FeO	23.27
	Sum	100.0		Sum	100.0

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Name	Description	SPI #	Each
Almandine	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1020-AB	$199.56