Sorry, but I’m going to keep this one brief since I’m very busy this weekend. There’s a new set of jewels this week, all of which can be found in Hell 7 & Hell 8. They’re all basic upgrades to the previous jewels, which is great! I did notice an odd discrepancy between what the Book says each monster drops, and what they actually drop, but after resetting the game a few hours later it seems to have fixed itself.
Play it yourself here: http://dan-ball.jp/en/javagame/ranger/