I concur about the photos. The strand in the photo is a stock photo, not a photo of the actual piece.
There is one other little trick I recommend employing, and that is examining the SKU. The SKU will usually tell you whether the photo is a stock image or the actual piece. The SKU for this strand is 9.5-15-MCTSSP-Bar-R-36. You can read it like a description, and the piece can repeated over and over again.
This is what 9.5-15-MCTSSP-Bar-R-36 means: 9.5-10.5 mm, multicolor Tahitian and South Sea pearl, baroque and round, 36 inches. There are no unique identifiers like numbers or letters added to it. That means it's a stock photo. There's a chance it's the first one they made and it hasn't sold yet, but if it's been on the site for a while, there is very little chance of that.
Also, if you ask for a photo, don't accept the answer "the one in the image is the one you will receive." That is typically the answer I've heard people receive even though it is not true. There are a few threads here on Pearl-Guide about this. One I specifically recall is
about this strand, which has been on their site for close to 10 years now. I believe there are two threads somewhere on PG about this particular necklace, twice purchased as "the strand in the image is the exact strand you will receive," yet what was received was completely different.