
DYOS Tool

Natural Minerals Group

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

# AS1150-AB

Diopside

MgCaSi₂O₆

Element	Wt %	Oxide	Wt %
O	44.30
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

Loose crystals

Locality: Wakefield, Quebec, Canada

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.
Click here for a mineralogical account of everything you might want to know about Diopside.

Name	Description	SPI #	Each
Diopside	SPI Supplies® Individual Mounted Microanalysis Standard Item	AS1150-AB	$
Diopside	SPI Supplies® Individual Loose Microanalysis Standard Item	AS1155-AB	$

# AS1120-AB

Chrome-diopside

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

(Mg,Cr)CaSi₂O₆

Element	Wt %	Oxide	Wt %
O	43.92
Na	0.33	Na₂O	0.44
Mg	10.34	MgO	17.15
Si	25.52	SiO₂	54.60
Ca	18.23	CaO	25.51
Ti	0.06	TiO₂	0.10
Cr	0.34	Cr₂O₃	0.50
Fe	1.08	FeO	1.39

Sum	99.8	Sum	99.7

Brilliant green loose grains

Cr-diopside in polished section

This is a reflected light micrograph of polished, carbon coated chrome diopside crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This material is a good standard for Cr in silicates where, when it occurs, is usually in small concentrations. Due to the presence of chromium (Greek root chrom = color) the material is brilliant green which can be seen when the mount is viewed with the naked eye. This sample comes from Batbjerg in East Greenland.
Click here for a mineralogical account of everything you might want to know about Chrome-diopside.

Name	Description	SPI #	Each
Chrome-diopside	SPI Supplies® Individual Mounted Microanalysis Standard Item	AS1120-AB	$
Chrome-diopside	SPI Supplies® Individual Loose Microanalysis Standard Item	AS1125-AB	$