Hm. A lot more brittle gems, 14 or so.
The Molten Coin gives no way in the rules that characters might "possibly losses [sic] a hand". I like the idea of the rest of the coins. The decanters are all right in general, but I absoutely hate the Decanter of Potion Purchasing, where you put in twice the potions market value for a dose of potion. That would have no place in my campaign, but it might work for others.
The search glasses from Magic Items I are mentioned here. That particular oversight seems to be a failure of editing. The Stone-view glasses seem more complicated than they need to be for distance and thickness to be seen through.
The Orbs are a good idea, but I'm not sure that permanently fusing it to the character is so great, but wishes, miracles, and divine intervention are rare enough in my campaigns that I change most magic items that require such things to be removed to require a remove curse with a varying caster level check.
The Sonic orb seems underpriced compared to the others (i.e. the same price) considering the very few creatures that have sonic resistance. The pricing of elements is by the book, it's just a personal preference.
This series is a very good value.
[4 of 5 Stars!]