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The secret of slow heating in glass bead making explained

Slow heat is key to creating flawless handmade glass beads Discover how careful temperature control improves durability shape ...
Yale Environment 360

Beads show European trade in African interior used Indigenous routes

Tiny glass beads discovered in mountain caves about 25 miles from the shores of Lake Malawi in eastern-central Africa provide evidence that European trade in the continent’s hinterland was built on ...