SPI Minerals Group

	Element	%		Oxide	%		diopside
	O	44.30							This is a reflected light micrograph of polished, carbon coated diopside crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. The nice smooth chunky crystals make this a very good standard for Mg, Ca and Si in silicates, and provides another diopside in addition to #16 for comparison. Specimens of diopside from Wakefield, Quebec are renowned for their quality. Locality: Wakefield, Quebec, Canada
	Mg	11.23		MgO	18.62
	Al	0.05		Al2O3	0.09
	Si	25.88		SiO2	55.37
	Ca	18.39		CaO	25.73
	Ti	0.05		TiO2	0.08
	Mn	0.04		MnO	0.05
	Fe	0.04		FeO	0.05
	Sum	100.0		Sum	100.0

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Name	Description	SPI #	Each
Diopside	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1150-AB	$199.56