For millennia, almost every person from the regions including Egypt, Mesopotamia, and central Asia, has worn substantial quantities of beads. After thousands of years of using natural materials such as bone, shells, and stones, bead making took a great technological leap forward. Glassmaking was developed, revolutionizing the world of beads, and in the process international trade. Overland trade routes crisscrossed central Asia, connecting the great civilizations of the Mediterranean to the west, with central Asia and India and China to the east. And glassmaking methods and styles were shared, but there isn't a chronological pattern from one period to the next. And many glassmaking industries seemed to develop successful technologies, with innovations and styles traveling along the trade routes.

"Mesopotamian" is a category that refers specifically to a region. Likewise, Egyptian denotes the place of origin, and Egyptian beads can be included among the Phoenician, Roman, and Islamic Period beads.

Five categories, Phoenician, Hellenistic, Roman, Byzantine and Islamic are used as, and refer to time periods, related in a general way to a region of concern, but also encompassing more than one region.

The history of beads is a rich span of overlapping periods: not a linear chronology marked by certain years as historical events, (which is the way we learned history in school.)

We do our best to be accurate in assigning categories. And each bead is a piece of history, with its own story; and organizing our collection by region and time periods stresses the similarities of certain styles and designs.
But there are always exceptions.

For centuries, Egyptian beads were held to be the finest in the ancient world . Small, easy to transport yet valuable, they became favored cargo of far-ranging Phoenician traders; glass beads were exported all over the ancient world. The relationship of the Egyptian glassmakers with the Phoenician traders was not only profitable, but also the foundation for mutual influence and the Phoenician glassmakers worked with Egyptian technologies to develop a flourishing industry of their own. For instance, no one can tell an Egyptian eye bead from ca. 500 BC, from a Phoenician eye bead of the same period. They are virtually identical, having come from competing industries; but ALL were traded by the Phoenicians along the routes they covered. So, we generally assign the beads to the category "Phoenician" unless the provenance is expressly Egyptian for a particular item, for example, with the region of origin identified as Alexandrian or as produced in Fustat, an Egyptian glassmaking center.