Chemistry: K(Li,Al,Rb)2(Al,Si)4O10(F,OH)2

Member of the mica group of minerals. It is the most abundant lithium-bearing mineral and a secondary source of this metal.

It is also a major source of the rare alkali metals rubidium and caesium. It was this that led to the discovery of the new element rubidium in 1861.

Notable occurrences include: Brazil; Ural Mountains; Russia; California USA; Canada; and Madagascar.

It is associated with other lithium-bearing minerals like spodumene in pegmatite bodies.

Crystal system: Monoclinic

Hardness: 2 ½ – 3 ½

Color: Pink, light purple, lavender, light rose red, grey

Luster: Sub-vitreous, resinous, greasy

It can be polished but because of how soft it is, it makes a poor material for jewelry there than pins and pendants.


Himalaya Mine- San Diego County


Yellow variety- Jequintinhonha valley

Southeast Brazil


Jequitinhonha valley

Southeast Brazil


Little 3 Mine- Ramona district

San Diego County, USA


Macon, Georgia 31210