What is Vulcanite and how does it form?
When volcanos errupt, they spew out firey lava, which, when it rapidly cools, becomes Vulcanite.
This gemstone is also known as:
- Volcanic rock
- Igneous rock
- Extrusive rock
- Effusive rock
Eruptive rocks have a fine-grained to glassy surface and have a fairly uniform color. Depending on the type of lava, the effusion stone may be present either as a rock fragment or as a frozen lava flow. A rock fragment (pyroclastic sediment) forms when the lava ejects explosively.
A well-known example of Vulcanite is Obsidian.