diff --git a/code/modules/mining/machine_redemption.dm b/code/modules/mining/machine_redemption.dm
index ce569ec055b..f3ccc31fcb7 100644
--- a/code/modules/mining/machine_redemption.dm
+++ b/code/modules/mining/machine_redemption.dm
@@ -52,6 +52,9 @@
 	var/datum/component/material_container/mat_container = materials.mat_container
 	if (!mat_container)
 		return
+		
+	if(O.refined_type == null)
+		return
 
 	ore_buffer -= O
 
@@ -179,6 +182,13 @@
 		if(user.transferItemToLoc(W, src))
 			inserted_disk = W
 			return TRUE
+			
+	var/obj/item/stack/ore/O = W
+	if(istype(O))
+		if(O.refined_type == null)
+			to_chat(user, "<span class='notice'>[O] has already been refined!</span>")
+			return
+		
 	return ..()
 
 /obj/machinery/mineral/ore_redemption/multitool_act(mob/living/user, obj/item/multitool/I)