Artificial aggregate with volcano ash (produced from freshly volcano mud) was evaluated as an aggregate that suitable used in concrete and lightweight concrete. This aggregate was produced by mixing the volcano ash alkaline activator which classified as geopolymer. The volcano ash artificial geopolymer aggregate can be formed by sintering process at 300 6000Cfor 1 hour. This artificial geopolymer aggregate have high strength, less water absorption and porosity with acceptable density which are comparable to the existence of aggregate in market. This aggregate can help to reduce global warming due to its geopolymerization process. In addition, the production of this volcano ash artificial geopolymer aggregate is using low temperature processing.