Hi bluelotus777,
It is a number of things about them, from shape to colour to lustre. They are small and baroque or freeform much like some necklaces I have, one of which is listed. I have round and off round too you could have a look at them but do have a look at these on my eBay site.
http://www.ebay.com/itm/VICTORIAN-A...ACE-with-15kt-GOLD-PEARL-CLASP-/261323272605? because they look the closest and I am positive they are Arabian Gulf (Basra)
They look very similar, just larger and have even more weird and wonderful shapes.
It is not one thing you can look for and you will make loads of mistakes. I still do and cannot say for sure these are Arabian Gulf/Basra, Pinctada radiate, but to me they do look like they are. I would love to hold them and inspect them but that is just not possible.
Just checked the URL of Pattye's thread. I remember her buying them. I think they are the ones I spotted and started a thread here letting others know. They were listed as Mississippi pearls. To me they look like Arabian Gulf pearls. They don't look like USA River pearls I have seen but they have been found to be that. But I still think they look like Basra.
Per Sharon: "NGL does not have the requisite analytical equipment to independently certify the origin--natural versus cultured - of pearls. However, microscopic examination and ultraviolet luminescence response are consistent with client information describing these as natural Mississippi River pearls."
As for the clasp it is good enough for natural pearls. That is all I meant but I have bought natural pearls from a friend who buys natural pearls for me in the UK and some have come on beautiful clasps and others have had very ordinary barrel clasps or even ring clasps. But a clasp can be an indicator. Just not a positive one but then nothing really is.
As others have pointed out the word "natural" is used way too much on eBay. I think as naturals have become far more popular again and people have actually realised there is such a thing as real natural pearls versus cultured many sellers have decided to cash in on their popularity. They don't know what they are talking about but it doesn't stop them and if you ask them for clarification can be told that cultured pearls are natural and just saying pearls means imitation. What rot. They are trying to cash in.
When I sell my naturals I guarantee them for life, not just eBay or PayPal's time. Those times do not give someone time to have them checked if they want to. I also, with my guarantee pay the postage costs back, both ways.
I have bought some extremely good looking "natural" seed pearls which were actually imitation. PayPal backed my return and I got my money back but the women fought like hell over it. Naturally I lost postage costs but that is normal. Problem was the woman waited a while and then re-listed them as "naturals", again. She said her jeweller had checked them out as natural which of course was baloney. No way even a jeweller could make a mistake with imitation pearls and I have found jewellers useless - sorry to any good jewellers out there. I don't think all sellers who list naturals mean to scam and as long as they give you a good guarantee and you feel you can trust them I think it is okay. Make sure of their feedback but if they sell loads of stuff that won't help much because of the percentage system.
Truly you will only learn by making mistakes. I still make mistakes and only know when I receive them and even then often you have to check the drill holes or smash one or two. Don't do that to any large pearls. So many I have need checking via X-rays etc.
Those particular pearls look good to me and there seems to be at least a couple that have peeling of nacre but in a natural way. That is something you really need to see. But I will try to add close ups of some naturals with extreme peeling and damage.
I am sure others will give their opinions.
Hope I haven't repeated myself. Sorry if I have.
Dawn - Bodecia
http://www.ebay.com/sch/dawncee333/m.html
eBay Seller ID dawncee333 Natural pearl collector & seller. And all round pearl lover.