Spray it with vinegar and if it foams it will be magnesium, but I'd lean towards zinc die cast.
[TABLE="width: 325"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Electric Motors[/TD]
[TD="class: price"]$0.13[/TD]
[/TR]
[TR]
[TD]Power Tools[/TD]
[TD="class: price"]$0.03[/TD]
[/TR]
[TR]
[TD]Zinc Die Cast[/TD]
[TD="class: price"]$0.50[/TD]
[/TR]
[TR]
[TD]Die Cast Breakage[/TD]
[TD="class: price"]$0.14[/TD]
[/TR]
[TR]
[TD]Copper Transformers[/TD]
[TD="class: price"]$0.17[/TD]
[/TR]
[TR]
[TD]Non-PCB Ballasts[/TD]
[TD="class: price"]$0.06[/TD]
[/TR]
[TR]
[TD]Sealed Units[/TD]
[TD="class: price"]$0.08[/TD]
[/TR]
[TR]
[TD]Alternators[/TD]
[TD="class: price"]$0.21[/TD]
[/TR]
[TR]
[TD]Starters[/TD]
[TD="class: price"]$0.16[/TD]
[/TR]
[/TABLE]
[h=3]
FERROUS [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per Ton unless noted[/TH]
[/TR]
[TR]
[TD]Prepared[/TD]
[TD="class: price"]$95/Ton[/TD]
[/TR]
[TR]
[TD]Unprepared[/TD]
[TD="class: price"]$65/Ton[/TD]
[/TR]
[TR]
[TD]Sheet Iron[/TD]
[TD="class: price"]$85/Ton[/TD]
[/TR]
[TR]
[TD]#1 Auto Cast[/TD]
[TD="class: price"]$130/Ton[/TD]
[/TR]
[TR]
[TD]#2 Cast[/TD]
[TD="class: price"]$80/Ton[/TD]
[/TR]
[TR]
[TD]Motor Blocks[/TD]
[TD="class: price"]$120/Ton[/TD]
[/TR]
[/TABLE]
[h=3]
LEAD [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Mixed Lead[/TD]
[TD="class: price"]$0.60[/TD]
[/TR]
[TR]
[TD]Lead Wheel Weights[/TD]
[TD="class: price"]$0.12[/TD]
[/TR]
[TR]
[TD]Range Lead[/TD]
[TD="class: price"]$0.40[/TD]
[/TR]
[TR]
[TD]Auto Batteries[/TD]
[TD="class: price"]$0.29[/TD]
[/TR]
[/TABLE]
[h=3]
STAINLESS STEEL [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Stainless Steel 304/18-8[/TD]
[TD="class: price"]$0.35[/TD]
[/TR]
[TR]
[TD]Stainless Steel 316[/TD]
[TD="class: price"]$0.43[/TD]
[/TR]
[TR]
[TD]Stainless Breakage[/TD]
[TD="class: price"]$0.08[/TD]
[/TR]
[TR]
[TD]Stainless Turnings[/TD]
[TD="class: price"]$0.26[/TD]
[/TR]
[TR]
[TD][/TD]
[TD="class: price"][/TD]
[/TR]
[/TABLE]
[h=3]
ALUMINUM [/h][TABLE="width: 357"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Used Beverage Cans[/TD]
[TD="class: price"]$0.48[/TD]
[/TR]
[TR]
[TD]Old Cast[/TD]
[TD="class: price"]$0.39[/TD]
[/TR]
[TR]
[TD]Old Sheet[/TD]
[TD="class: price"]$0.40[/TD]
[/TR]
[TR]
[TD]10-10 Extrusion[/TD]
[TD="class: price"]$0.50[/TD]
[/TR]
[TR]
[TD]Painted Siding[/TD]
[TD="class: price"]$0.45[/TD]
[/TR]
[TR]
[TD]Alum Copper Rads[/TD]
[TD="class: price"]$1.10[/TD]
[/TR]
[TR]
[TD]Alum Copper Rads Cont[/TD]
[TD="class: price"]$.70[/TD]
[/TR]
[TR]
[TD]Insulated Aluminum Wire[/TD]
[TD="class: price"]$0.25[/TD]
[/TR]
[TR]
[TD]EC Wire[/TD]
[TD="class: price"]$0.53[/TD]
[/TR]
[TR]
[TD]Aluminum Transformers[/TD]
[TD="class: price"]$0.03[/TD]
[/TR]
[TR]
[TD]Aluminum Breakage[/TD]
[TD="class: price"]$0.12[/TD]
[/TR]
[/TABLE]
[h=3]
COPPER [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Bare Bright[/TD]
[TD="class: price"]$2.70[/TD]
[/TR]
[TR]
[TD]#1 Copper[/TD]
[TD="class: price"]$2.51[/TD]
[/TR]
[TR]
[TD]#2 Copper[/TD]
[TD="class: price"]$2.36[/TD]
[/TR]
[TR]
[TD]#1 ICW (70%)[/TD]
[TD="class: price"]$1.30[/TD]
[/TR]
[TR]
[TD]Romex (65%)[/TD]
[TD="class: price"]$1.21[/TD]
[/TR]
[TR]
[TD]#2 ICW (50%)[/TD]
[TD="class: price"]$0.88[/TD]
[/TR]
[TR]
[TD]Drop Cord (35%)[/TD]
[TD="class: price"]$0.43[/TD]
[/TR]
[TR]
[TD]Sheet Copper[/TD]
[TD="class: price"]$2.02[/TD]
[/TR]
[TR]
[TD]MCM (85%)[/TD]
[TD="class: price"]$1.77[/TD]
[/TR]
[TR]
[TD]Christmas Lights[/TD]
[TD="class: price"]$0.20[/TD]
[/TR]
[/TABLE]
[h=3]
CATALYTIC CONVERTERS [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"][/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"][/TH]
[/TR]
[TR]
[TD][/TD]
[TD="class: price"][/TD]
[/TR]
[/TABLE]
[h=3]
STEEL & ALUMINUM RIMS [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Aluminum Rims on Car[/TD]
[TD="class: price"]$7/Each[/TD]
[/TR]
[TR]
[TD]Aluminum Rims with Tires[/TD]
[TD="class: price"]$0.10[/TD]
[/TR]
[TR]
[TD]Clean Aluminum Rims[/TD]
[TD="class: price"]$0.60[/TD]
[/TR]
[/TABLE]
[h=3]
BRASS [/h][TABLE="width: 760"]
[TR]
[TH="bgcolor: rgba(0, 0, 0, 0.0666667)"]Item[/TH]
[TH="class: price, bgcolor: rgba(0, 0, 0, 0.0666667)"]Price
*per lb. unless noted[/TH]
[/TR]
[TR]
[TD]Yellow brass[/TD]
[TD="class: price"]$1.74[/TD]
[/TR]
[TR]
[TD]Red brass[/TD]
[TD="class: price"]$1.88[/TD]
[/TR]
[TR]
[TD]Brass breakage[/TD]
[TD="class: price"]$0.40[/TD]
[/TR]
[TR]
[TD]Brass radiator[/TD]
[TD="class: price"]$1.52[/TD]
[/TR]
[/TABLE]