Well, actually no, I meant the candling more for your information, so you could get an idea if the pearls were bead cultured Akoya rather than Natural pearls, because that would give you an idea of the value, or price you could realistically hope for. The clasp will add to the total value of the pearls.
It's incredibly difficult to get good pictures "candling". Our posters who did worked long and hard to get to that skill level. They have good cameras, too.
It's tempting to wish to not have to do the things that cost out of pocket, but following the steps to a legitimate appraisal will get a better return. Go back, re-read the posts, you'll see the information the experts gave you.
Shoot, say you only sold them for $2000, wouldn't the cost of an appraisal be worth that? And if I were bidding on that necklace wouldn't I be willing to spend more if I KNEW what I was bidding on, rather than just hoping?
Start here, do the mid-day shade photographs again, borrow a better camera, if you can. Or if you can't, then photograph the pearls in sections, that should counteract an inadequate lens. Understand the patient, step by step way will do better for you.