During drilling, the tips of agate drills become hot and often spall off.
Ancient Indus Valley civilization beads.
Jasper drill bits were used for drilling carnelian and amazonite beads during the Ravi and subsequent phases at Harappa. On the left are two snapped drill tips while on the right is a broken drill base. All are from the Ravi phase.
This terra cotta bead necklace with two strands of long biconical beads dates to the Ravi Phase (c. 3300 BCE).
Many different styles of terra cotta beads were made during the during the Ravi Phase at Harappa (circa 3300 BCE-2800 BCE).
Steatite beads from the Early Harappan Periods at Harappa. On the right are many different styles of Ravi Phase beads (circa 3300-2800 BC). Note the blue green glazed bead in the center and the row of unfired beads in the second to the bottom row.
These beads from the Ravi Phase (3300-2800 BCE) at Harappa have been made from carnelian and amazonite (right hand bead). The raw material used to make these beads was brought to the site from source areas probably in Gujarat, over 900 km to the
The technique for making tiny beads is still practiced by craftsmen today. Mullah Ashoor from Peshawar is seen grinding a string of tiny steatite beads that will later be fired to make them hard
In the street levels above the drain a collection of banded sandstone and banded terracotta beads were discovered.