"AP"	"Aphanitic (<<1mm - none visible)"
"CG"	"Coarse-grained"
"FG"	"Fine-grained"
"FMG"	"Fine to medium grained"
"GL"	"Glassy"
"MCG"	"Medium to coarse grained"
"MG"	"Medium-grained"
"MS"	"Mixed sizes"
"NR"	"Not Recorded"
"PG"	"Pegmatitic, v-coarse (>30mm)"
"VCG"	"Very coarse-grained"
"VFG"	"Very fine-grained"
