void main()
{
    object oGem = GetFirstItemInInventory(OBJECT_SELF);
    object oAnotherItem = GetNextItemInInventory(OBJECT_SELF);
    object oAnvil = GetNearestObjectByTag("NK_FP_ANVIL", OBJECT_SELF, 1);
    if ((oGem != OBJECT_INVALID) && (GetTag(oGem) == "NW_IT_GEM011") && (oAnotherItem == OBJECT_INVALID))
        {
        SetLocalInt(oAnvil, GetTag(OBJECT_SELF), 1);
        }
    else if ((oGem != OBJECT_INVALID) && (GetTag(oGem) == "nk_garnetlrg") && (oAnotherItem == OBJECT_INVALID))
        {
        SetLocalInt(oAnvil, GetTag(OBJECT_SELF), 2);
        }
    else if ((oGem != OBJECT_INVALID) && (GetTag(oGem) == "nk_rhodolite") && (oAnotherItem == OBJECT_INVALID))
        {
        SetLocalInt(oAnvil, GetTag(OBJECT_SELF), 3);
        }
    else
        {
        SetLocalInt(oAnvil, GetTag(OBJECT_SELF), 0);
        }
}