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