Glass

The Roman historian Pliny reported that the first man- made glass was

accidentally produced by Phoenician merchants in 5, 000 BCE, when, while resting on a beach, they placed cooking pots on sodium- rich rocks near a fire.

At the beginning of the Bronze Age

glazed pottery was produced in Mesopotamia.

Venetian goblet

________ made in Italy in the early 19th century, Metropolitan Museum of Art, New York City.

Glass

________: silica that is nano- crystalline in structure; relatively disordered silicate tetrahedra.

Glass

silica that is nano-crystalline in structure; relatively disordered silicate tetrahedra

Around 7,000 BCE,

people were already using sharp tools made from obsidian, a natural occurring volcanic glass

it was not until 1,500 BCE that Egyptians started

building factories to create glassware for ointments and oils.

The most familiar, and historically the oldest, types of manufactured glass are

"silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand.

The heat from the fire

melted the rocks and mixed them with the sand, forming molten glass.

Archeologists have not been able to

confirm Pliny’s recount.

Simple glass items, such as beads, have been discovered in

Mesopotamia and Egypt dating to 3,500 BCE.

Venetian goblet made in

Italy in the early 19th century,