Here Are 11 Most Fascinating Obsidian Types or Varieties
Obsidian is a natural volcanic glass often called a volcanic or extrusive igneous rock. IUGS considers it a mineraloid since it has > 80% glass.
Gemstones
What Is Falcon’s or Hawk’s Eye (Blue Tiger’s Eye) in Gemstones
Falcon, hawk’s cat’s eye, or blue tiger’s eye refers to a blue to bluish-grayish, semi-precious, inexpensive, chatoyant quartz gemstone formed by the intergrowth of subparallel
What is a Tiger’s Eye Gemstone and How Does it Form?
Tiger’s eye (pseudocrocidolite, tiger eye, or tigereye) is a golden-yellow to golden-brown to reddish-brown attractive, popular, yet inexpensive gemstone that exhibits chatoyancy due to the
What Is Behind Chatoyancy (Cat’s Eye Effect) in Gemstones and Examples
Chatoyancy or chatoyance (pronounced shə-TOY-ən-see) in gemology is a mystical optical phenomenon also known as the cat’s eye effect displayed by some stones (minerals, gemstones,
13 Minerals that Show Cat’s Eye Effect and Their Uses
A cat’s eye gemstone or mineral reflects a narrow, concentrated, sharp band of light movable on the convex surface of appropriately cut en cabochon as