First, understand that 99.99% of what is claimed to be Faberge on ebay is NOT genuine. I have seen less than three genuine Faberge items on ebay in the last six months. Two were from well known and reliable dealers, the third was a knife handle with a later and bad new blade put on it.
The brooch: As Robert said, the quality is awful. Another dead giveaway in addition to what he already said are the obvious hooks holding the stone to the frame. Faberge never would have left them visible. The back side is ragged, unfinished and the pin is flimsy. the box is wrong.
Faberge pieces are always virtually flawless in design and execution. If you see an obvious hinge, unfinished edge, sloppy balance, etc. run away! Even if the stones are real and the gold/silver genuine, that is not enough.
This Bulgarian dealer, "MilitaryaBG", sells NOTHING but fakes. Each one with an alleged Imperial provenance. Sadly, each one is a total fabrication. Now some pieces are "real" russian antiques of mediocre quality, with eagles slapped on and some "royal" provenance cobbled up.
Here is a "howler" from one of his postings "AND ONLY 5% WAS MADE PERSONALY BY CARL FABERGE. THIS IS THE FIRST ITEM THAT I HAVE EVER SEEN ALIVE THAT WAS MADE BY THE HANDS OF THE GLOURIOUS MASTER!"
Actually, ZERO % was "made personally" by Carl Faberge after about 1872. Faberge was a designer, and excellent manager, but never produced a single item himself.
Dates: Check date marks carefully. For example, The piece this Bulgarian fraud has listed now says: !!!AN ANTIQUE IMPERIAL RUSSIAN SOLID HEAVY SILVER&SAPPHIRES PRESENTATION FISH SERVING SET "SEA MONSTER" BY CARL FABERGE!!! IT HAS BEEN ORDERED BY HES MAJESTY ALEXANDER II OF RUSSIA,AND CARL FABERGE PERSONALY MADE IT FOR HEM!!!
The photos show a Moscow city stamp, and assay master BC over 1872, then "84" and "K.. Faberge" in cyrillic with the double headed eagle indicating Imperial Warrant status.
Now, the Moscow mark and Assay Master check out fine. Victor Savinkov was the Moscow assay master during the period. The problem here is this: THERE WAS NO MOSCOW BRANCH OF FABERGE IN 1872! In 1872, Carl Faberge had just returned to Petersburg and went into the family jewelery business with his brother Agathon. The next "problem" is that Alexander II never ordered anything from them. The Imperial warrant didn't come until Alexander III gave it to him for the first Easter Egg in 1885.
So what can we conclude from just this one listing? The fish service is probably a real decent piece from Moscow 1872. this Bulgarian charlatan added the fake Faberge stamp and a fake box with bogus Alexander II cypher to pass it off. This is typical.
Another spurious dealer is "margo222425", real name Rita Moshel. check out her alleged "Faberge" clock, item 330062924716. Looks pretty good huh? Decent enamel work and guilloche, mine cut diamonds... Notice the little "crown" though on top. doesn't belong there, was added to "hint" at being "Imperial". Look at the dial. Says faberge right there doesn't it? WRONG! First, genuine Faberge clocks are scarcer then hen's teeth, they made very few. NOT ONE ever had "Faberge" on the dial face. Faberge NEVER would have done that and never did. third problem, check out the hallmarks. Look right, BUT, we have a typical mistake these forgers make. They have the Moscow city hallmark with a St Petersburg city Assay Master stamp. oops.....I actually contacted this seller and told her it was a fake and expained why. She insisted its real, and never changed the listing.
ANY REAL DEALER OF FABERGE WILL ALWAYS GUARANTEE AUTHENCITITY IN WRITING. ALWAYS. if they say "is on consignment so I cant" or some other lame excuse...ts fake...
Also, look at alot of the pricing of these lowlifes. You will see "buy it now" for $5,000. Seems like a lot of money,right? Well check the recent Christies London Sale of November 2006, and see what prices GENUINE Imperial Faberge fetches. A real Nicholas II presentation Faberge cigarette case sold for a half million US Dollars! They price things low enough that they seem a "bargain" but just high enough to seem "expensive".
Trust me, there are no Faberge bargains on ebay.