Fire opal is not an igneous rock; it is a mineraloid form of opal, primarily composed of silica. While it can form in volcanic environments, it is classified as a gemstone rather than a rock type. Fire opal is known for its vibrant colors and play of color, which result from its unique internal structure rather than crystallization like igneous rocks.
Neither. Opal is a mineraloid, as it does not have a sufficiently organized structure to be considered a mineral.
Another name for opal is "fire opal."
Fire opal:)
There are 5 basic types of opal. These types are Peruvian Opal, Fire Opal, Girasol Opal, Common opal and Precious Opal.
The types of Opal that i am familiar with are White Opal, Fire Opal, Boulder Opal, Black Opal, Crystal Opal, Light Opal, Doublet Opal, Triplet Opal, Common Opal, Synthetic Opal, and Immitation Opal.
yes
Its a rock. Just a shiny one.
Stones similar to opal include labradorite, which exhibits a play of color known as schiller, and moonstone, known for its adularescence and shimmering effect. Other alternatives are fire opal, which displays vibrant colors, and boulder opal, featuring the host rock integrated with the opal. Additionally, synthetic opals, created in labs, mimic the appearance of natural opals but are more uniform in color.
The black fire opal.
No, it's actually a form of silica.
igneous
If you mean state rock, Colorado's state rock is yule marble