The Viking World by James Graham-Campbell, the 1980 version.
This book contains alot of good reference images, both photographs of artifacts and line drawings of the same. There are some schematic drawings of villages and women at work at bring all the information together in one image. A variety of topics are covered, from boat building to hoards and jewellery making. A large variety of primary sources are presented in this book. Well worth the read even if some of the conclusions are no longer up to date.
Strings of beads from Birka. page 118 Inner string of beads are made of imported crystal and carnelian.