Product Description

Rock Type:  Chloritized biotitite

Location:  Brazil

Description:  Altered sphene after Ti-magnetite on biotite margins.  Note the exsolved ilmenite lamellae (pink grains) still preserved within the altered sphene.  Biotite grains (orange-yellow) have been chloritized (green) along grain margins and cleavage planes.  They commonly contain fine-grained ilmenite grains (black) and ilmenite development along cleavage planes.  The rock was studied for its titanium-vanadium potential.