Ardy, I'm delighted that your partner has such good taste and knows you so well that they can chose something so lovely for you. Hang onto them!
It there a deep ambery colour at the centre, or is that just an artifact of the light?
With a mention of Sweden, and if that colour is there, might it have something to do with John Orwar Lake and Ekenas?
It is strange that something so good is, so far, unknown to us. I'm starting to suspect it might be some unique special something.
It there were a fair number of them around, we'd have seen them before.
Is there any age-related wear anywhere around the base?