VOLCANIC ROCKS INDONESIA
Indonesia is a volcanic active country, containing numerous major volcanoes. It has the most volcanoes of any country in the world, with 76 volcanoes that have erupted at least 1,171 times in total within historical times. Indonesia has around 130 active volcanoes that are part of the Pacific Ring of Fire, and it has suffered the highest numbers of eruptions resulting in fatalities, damage to arable land, debris flows, tsunamis, lava domes, and pyroclastic flows. Indonesia's most active volcanoes are Kelut and Mount Merapi on the island of Java.
I've visit Mount Bromo and Merapi volcano on Java and collected some hand picked magma volcanic rocks, available now in my shop.