25 Extremely Magnificent Minerals And Gemstones In The World

Sunset Fire Opal: It is an amorphous mineraloid comprising an accumulation of tiny hydrated silica spheres that produce a dominant reddish-orange spectrum upon light reflection. Although it is commonly misclassified as a “mineral,” fire opal is actually not a mineral because it does not have its own crystalline structure. In fact, all opals comprise different sized silica sphere-structures. And these size variations ultimately result in the variable spectrum of color when reflecting light.Fire opal is any specimen of an opal gemstone that naturally displays a dominant red, orange, or yellow color. There are different types of fire opal that vary in play-of-color, background color, and origin. And fire opals are amorphous mineraloids that comprise hydrated silica (SiO2·nH2O). Opal itself lacks the structural organization necessary to form crystals. Thus, fire opals do not classify as minerals, nor are they considered sedimentary, igneous, or metamorphic rocks.