Zeolite is one of non-metallic minerals or multi-use industrial
minerals due to its physical and chemical characteristic as an absorbent, ion exchange, molecular filters and
as a catalyst. Minerals in zeolite group are generally found in tufa rocks formed from volcanic-ash sediments
resulting from alteration, diagenesis, and hydrothermal processes. Indonesia is laid in the volcanic series
from Sumatra, Java, Nusa Tenggara, until Sulawesi Islands. One of the products of volcanic tuff wide
spreading form the volcano, partially or wholly have undergone a process of alteration or diagenesis to
become zeolite. Geologically, Indonesia has big potential to produce zeolites such as those found in
Lampung, West Java, Central Java, East Java, East Nusa Tenggara, and Sulawesi, with the estimate
resources of 447,490,160 tons.
