Please note that I edited my first reply as I made a mistake the first time I looked at your photos. On looking again I see that only one of the necklaces is graduated.
Welcome to Pearl Guide!
You have 1 graduated knotted strand of vintage akoya pearls with a 10K gold fish hook clasp; the other is not graduated and not knotted, but also has a gold clasp.
I think the unknotted strand is also akoya --are they all round? The photo makes some of them look a bit...
These are called tokki pearls. SSEF magazine (Swiss Gemmological Society) used to have a good article on how these form but the article seems to be gone.
Two pearls join to form one pearl; the smaller sometimes forms from a bit of broken off mantle tissue that forms a pearl sac and secretes...
I think the OP was wondering where the bit of pearl dust on the black mat came from. Marianne explained that it could be dust from the drill hole, left over after drilling.
You may wish to read this detailed and highy informative series on mabe and blister pearls, written by @CortezPearls.
It starts here:
https://www.pearl-guide.com/threads/i-introduction-to-blister-and-mabe-pearls-ultimate-guide.454956/
You can see what new (not pre-owned) baroque Tahitian pearls are listed for on Etsy.
https://www.etsy.com/search?q=baroque+tahitian+pearls
Pre-owned pearls typically sell for less. And then there are the fees for listing the item. In the end you might not make very much.
I would be inclined to...
The market prefers round pearls-- large round pearls are scarcer, and if it has great color and luster, a large round Tahitian can be quite valuable!
Baroque and circled pearls are more common, and thus have a lower market value than rounds. Blemishes reduce value also. So I would say, while it...
1. The flat drilled one is a dyed cultured freshwater "second harvest" pearl.
This is how these pearls come to be: The freshwater mussel has a bit of donor mantle tissue implanted in its own mantle, which grows into a pearl sac and secretes nacre, making a pearl. (Usually many such bits of...