work

code/game/objects/items/stacks/bscrystal.dm

@@ -53,7 +53,7 @@
 	blink_range = 4 // Not as good as the organic stuff!
 	points = 0 //nice try
 	refined_type = null
-	grind_results = list("bluespace" = 10, "silicon" = 20)
+	grind_results = list("bluespace" = 10, /datum/reagent/silicon = 20)
 
 //Polycrystals, aka stacks
 /obj/item/stack/sheet/bluespace_crystal

code/game/objects/items/stacks/sheets/light.dm

@@ -11,7 +11,7 @@
 	throw_range = 7
 	flags_1 = CONDUCT_1
 	max_amount = 60
-	grind_results = list("silicon" = 20, "copper" = 5)
+	grind_results = list(/datum/reagent/silicon = 20, "copper" = 5)
 
 /obj/item/stack/light_w/attackby(obj/item/O, mob/user, params)
 	if(istype(O, /obj/item/stack/sheet/metal))