"The Indians living in California numbered 340,000 in the late 1700’s, but only 100,000 remained after roughly 70 years of Spanish missionization.
Coastal Ohlone groups often traded shells, dried shellfish, and obsidian to inland peoples. In exchange the Ohlone received arrowheads, pinon nuts, stone and bone beads and chert for tools.
Everyone prized cinnabar from the nearby Santa Cruz Mountains for its use as a red body paint important in ceremonial activities."
From: Missions of the Monterey Bay Area By Emily Abbink, 1996.