Fluorite 15-19x22-27mm AAA Grade Small Free Form Cabochon ruby sapphire The name "biotite" is used

The name "biotite" is used because these minerals generally cannot be distinguished without optical

intricate patterns of minute black flecks

The stone fragments remain clearly visible

but can be distinguished by its structure and its lower relative hardness

Fluorite 15-19x22-27mm AAA Grade Small Free Form Cabochon ruby sapphire The name "biotite" is usedFluorite is a luminous, soft and glassy stone, sometimes referred to as the most colorful mineral in the world. It is one of the most sought to after minerals among gem and mineral collectors, second only to Quartz. The term fluorescent was inspired by Fluorite, one of the first fluorescent minerals ever studied. It is frequently fluorescent under ultraviolet light, and this phenomenon is thought to be due to impurities of yttrium or organic matter