One think to always be cautious about is gold and other valuable things from China.
My opinion.
First off, its too yellow for 18k. 18k is rich in color but should not look like fine gold, this is a give away for plate.
Second they dont show the hall mark.
Third, the "diamonds" in there have slight curves at the facets. Diamonds are very hard and take precision to cut. the edges will be sharp with a crisp edge like this > If you take a look on the larger stone the facets seem to have a slight curve too them on the edge, an indication that they are softer and machine cut and done fast, so fast that the stones get slight rounding on the facets edges when they roll to the next facet during cutting.
Forth, those are some of the nicest I2 stones I have ever seen. I2 means very included. And by industry standards an I2 stone will look like the crap you see at your local walmart. It will look like frozen spit or be filled with what looks like pepper. Just because the diamond grade is listed does not mean its going to be good diamond. It amazes me what little cards and Certificates do to sell crap.
Notice that in one line it states solid 18k gold and the next it says gold tone. Translation errors aside the auction cant keep its story or contradictions in order.
Then take a look at what other crap mr Chinaman is selling. All small crap and nickel and dime type items, most transactions under $20 to get that feedback, and also notice that the purchases that are gold are from Very low feedback profiles and also buy on other china sellers. Hmmmm.
Ok, now this outfit has multiple accounts, builds them up over a year or so selling small crap, and then right before xmas starts selling all these high end all 18k items worth thousands of dollars, for a couple weeks they can bring in thousands if not tens of thousands of dollars. Makes selling the piddly junk worth it for the next year...and how many other accounts do they have for the next one? probably a lot.
Also notice the construction of some of these items do not have soldered loops, or jump rings.
ALL HIGH END AND WELL MADE JEWELRY WILL HAVE SOLDERED OR CLOSED LOOPS! never will it be open or just bent on. This is a dead give away for plated or pot metal crap.
I already see one neutral feedback on there for one of the gold items...I doubt that they will even send them the junk jewelry, They are going to sell till the last min and then take what money they got and Ebay will close the account.
Keep in mind, the people from China take. they will not sell gold, a world wide commodity and sell it for less. These are people who take our money, our jobs. and companies, These people are taking our prosperity from right under our noses and we are thanking them for it..."because its cheap"
Just because something is cheap does not mean its quality...or worth having.
I would steer clear and report them to Ebay as a scam. If you dont believe me or value my knowledge or experience. Go ahead and buy it and prove me wrong...but dont cry to me when it does not show up or something fake does.
I cant tell you how many times someone comes to me with some crap they bought on ebay that they think is gold and want to sell it too me and then get to break the news too them they got scammed. Usually they are victims of fraud...with the exception of one time when I was on vacation in Vegas and some black guy in a car was like "Hey you like jewelry, check dis out. It worth about $15k and from a store up da street"
I looked at it, it was a $7 walmart plated ring that the guy had put a fancy little bar code tag on and a value of $15,000 The fake stones were so fake it was painful as well as the plate.
I took the ring and bent down to the ground and scratched the holy living F$$$ out of it and came back up and Said, "Look A$$ hole, I am a F$$$ing jewelry and know crap when I see it, its fake see!"
He then tried to grab it from me and said "gimme dat" and drive off at the same time. That didnt go to plan. As he drove off I took the ring and used it to scratch the side of his car! The white line on the black paint was a wonderful site to see as he sped off, I got the back door and back fender good!. I took the ring down the local Police and filed a report and gave it too them.
Fact is, there are people out there that will scam you and take your money, and of course they are going to offer satisfaction or your money back...the trick is. they dont mean what they say, they lie!