By 1000 BCE, the inhabitants of the Philippine archipelago had developed into four distinct kinds of peoples: tribal groups, such as the Aetas, Hanunoo, Ilongots and the Mangyan who depended on hunter-gathering and were concentrated in forests; warrior societies, such as the Isneg and Kalinga who practiced social ranking and ritualized warfare and roamed the plains; the petty plutocracy of the Ifugao Cordillera Highlanders, who occupied the mountain ranges of Luzon; and the harbor principalities of the estuarine civilizations that grew along rivers and seashores while participating in trans-island maritime trade. It was also during the first millennium BCE that early metallurgy was said to have reached the archipelagos of maritime Southeast Asia via trade with India.

Mining in the Philippines began around 1000 BCE. The early Filipinos worked various mines of gold, silver, copper and iron. Jewels, gold ingots, chains, calombigas and earrings were handed down from antiquity and inherited from their ancestors. Gold dagger handles, gold dishes, tooth plating, and huge gold ornaments were also used.