Elbaite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameElbaite
Chemical FormulaNa(Li,Al)3Al6(Si6O18)(BO3)3(OH)4
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavageindistinct/poor parallel to {1120}
Fractureconchoidal to uneven
Specific Gravity3.06
Colorspink, red, green, blue, yellow, colorless, multi-colored
Transparencytransparent
Type LocalityTourmaline Queen Mine, Pala District, San Diego County, California, USA
Mineral GroupSilicates (Cyclosilicates, Tourmaline Group)
Usesjewelry, collector
Associated Mineralsquartz, feldspar, lepidolite, muscovite, beryl, spodumene, cleavelandite
Rarityuncommon
Description
This image displays a stunning bi-colored Elbaite crystal, transitioning from a vibrant pink/red base to a clear green termination, showcasing its excellent transparency and characteristic trigonal prism habit.
Geological Context
Elbaite is a member of the tourmaline group that typically forms in lithium-rich granitic pegmatites, often crystallizing during the late-stage hydrothermal activity within these intrusions.
