SAPPHIRINE is a principal constituent of certain high grade silica-deficient metamorphic rocks at Fiskenaesset ... it is one of the few rock-forming minerals with unknown crystal structure.

Crystals? Stones? Gems? Rocks? What’s the difference ... Crystals are often formed through cooling molten minerals or the evaporation of water containing dissolved minerals.

That's because rocks are made of different minerals and rocks get their names (mostly ... So, why can you see stuff in the microscope when the light is "doubly polarized"? Bending the Light That's ...

Let’s explore the deadliest crystals, minerals, and gemstones that, despite their dazzling appearances, pack a dangerous punch. 1. Arsenopyrite At first glance, arsenopyrite looks like a shiny ...