Bournon may be taken perhaps as an instance of the combination in which the red oxide is found in the greatest quantity. The minerals which occur at Gellivara, besides the corundum, in the feldspar separating the layers or within them, are chiefly the following.
1. White or grayish calcareous spar.
2. Small calcareous crystals.
3. Ditto siliceous ditto.
5. Green glassy actinolite, sometimes crystallized in four-sided prisms.
5. White pretty hard asbestus.
6. White yellowish phosphate of lime, nearly of the same colour as the corundum, commonly imbedded in a black blueish magnetic ore, forming almost one half of it, and giving to the whole mass a singular appearance.
7. Red phosphate of lime of a rosy tint and granular form. In some of the specimens I brought with me to Paris, I discovered some small but very regular hexahedral prisms of this substance, which I never met with afterwards.
8. I might also add several varieties of quartz and mica, which however mostly form with the felspar either gneiss or granite.
P. S. Since writing the above memoir I have again examined the Gellivara iron-ore, and have found amongst it some specimens of true emery.
