There's more information (about the jewellery seen in War and Peace) than anyone could sensibly need on this website
Shot on location in Russia, Lithuania and other Eastern European
countries, characters are seen wearing jewelry made by Russian jeweler
Part of the collection was made specifically for the TV series. Other
items were selected by Gibbon's team from existing collections. "We
were surprised by their choice because the jewelry they selected was
from a later period, specifically art nouveau. When I was making those
items, I was inspired by completely different things," Axenoff says.
Based on interviews with the show's makers on the BBC blog, it would seem that they also supplemented the Axenoff items with paste jewelry and some bits and bobs from the BBCs own prop archive:
Jewellery is still all about impact and making a statement. For me in
War and Peace it's a great way to accessorise the very simple gowns
that we wanted to create - free from too much surface decoration and
unnecessary ornamentation. The jewels were sourced from all around the
world. From Indian markets in Southall, flea markets in Lithuania, St.
Petersburg, Prague and Rome to beautiful pieces designed especially
for us by a Russian jeweller.
The action of the story takes place at such an interesting time for
fashion. It is where we see the birth of modern fashion as we
understand it today. The aftermath of the French Revolution saw people
turning their back on formal aristocratic styles. And this was coupled
with Napoleon’s visionary ideas to create more revenue for French
fabrics by creating the fashion seasons, changing four times a year as
they do today. And fashion is cyclical, everything goes round.
"Edward K Gibbon is the costume designer for War and Peace."