Pleochroism was usually weak to medium for crystals from ... Hexagonal allanite crystals with relicts of U-bearing thorianite and REE carbonates were also detected next to plagioclase and sapphire ...

The countertop has quartz, plagioclase feldspar, potassium feldspar and biotite? That is likely granite. At another house it is all calcite...now that's marble. Slicing Up the Rocks However, the ...