In one embodiment, the facecoat region is formed from {HEAD ~ a slurry composition} comprising an aluminum oxide, {TAIL ~ a green chromium oxide} and a silicon dioxide 
comprising
In one embodiment , the facecoat region is formed from { HEAD ~ a slurry composition } comprising an aluminum oxide , { TAIL ~ a green chromium oxide } and a silicon dioxide
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH