[[Image:Dia_Yboundary.jpg|thumb|300px|A strange artifact, potentially challenging the notion that this is a mono-crystal. A slightly different lighting angle shows very flat surfaces (so these are not likely surface features.)]] | [[Image:Dia_Yboundary.jpg|thumb|300px|A strange artifact, potentially challenging the notion that this is a mono-crystal. A slightly different lighting angle shows very flat surfaces (so these are not likely surface features.)]] |