The rose crystal, IMO, fits the description Vasdenjas gave of memory gems in Book of Dragons. Given it's size it probably doesn't hold a lot of information, but what it does hold, if anything, is apparently incredibly important to the immortal elves of the Wyrm Wood. Obviously more than just a shiny bauble, since it's exchange for the everliving flower pissed Alachia off enough to commit her army to the second Theran War.
The Rose Crystal is a memory crystal. That is stated in the Dragons PDF.
But to the argument, Alachia gained the Rose Crystal when the Everliving Flower was stolen. So if she really prized it for its information, then she should have been more happy with this exchange. After all the Flower appears to be less useful, its only known function showing the presence of Dragonkin. (duh

) So I think it was more about the symbolic value.
About Shosara. According to what i have found out by searching the web, it was originally meant to be in Arkhangelsk, but it was retconned to be located in Sweden by Redbrick, who had a supplement in the Works about Shosara, which unfortunately never came out. Whether it was Redbricks idea or the idea originated with FASA i dont known, but it fits with the description of Sweden in Shadows of Europe, where Sweden is also shown to have a high percentage of elves in the population.
Apparently the original Theran map is supposed to be "inaccurate"
Thanks. I have to read up on some of this for the Crossover aspects. Unfortunately the old Red Brick forums are not really preserved in the Internet Archive, few old forums are.
The arrow could point at Arkhangelsk rather than beyond it, given that it's on the margin. It would have to point a bit lower at the tip of the bay to indicate Arkhangelsk directly. Hm, I don't know, Shosara is described as bordered by sea on three sides that would fit with the Kola peninsula not really with the city or the surrounding land. Maybe this was already a misreading of the clues.

but it fits with the description of Sweden in Shadows of Europe, where Sweden is also shown to have a high percentage of elves in the population.
Sweden has 14%, but France has 18%. Overall it seems to be above 10% on average in Northern Europe and tends to be more around 5% in Central to Eastern/Southern Europe. I guess the elf population does have a bit of a Nordic bias (though at 14% I wouldn't call it of the chart).
but as i commented earlier the cover art actually does have a vikingish feel to it, with the shields, weapons, beards, braids and fur lined clothes and the landscape behind them could very easily be a Swedish Fjord.
True.