The term 'FIRE STONE' is a combination of two words, 'FIRE' and 'STONE'. FIRE STONE is a type of OPAL, which is a mineraloid composed of hydrated amorphous silica. It is usually found in sedimentary rocks and has a wide range of colors, including red, orange, yellow, green, blue, purple, pink, brown, and black. FIRE STONE is a particularly vibrant type of OPAL, with a bright red hue. It is often used in jewelry and is highly sought after for its beauty and rarity.