Image: Andrew Silver (Public domain)
orthorhombicuncommonPhosphates
Wavellite
Al3(PO4)2(OH,F)3·5H2O
Wavellite typically forms radiating, spherical, or hemispherical aggregates of acicular to prismatic crystals, often exhibiting a vibrant green to yellowish-green hue.
Wavellite Physical Properties
Mohs Hardness
3.5Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
Good on {110}, distinct on {101} and {010}Fracture
unevenSpecific Gravity
2.35Colors
green, yellow-green, white, colorless, brown, blueTransparency
transparentType Locality
Chester County, Pennsylvania, USAMineral Group
PhosphatesUses
collector, minor gemstoneAssociated Minerals
limonite, variscite, turquoise, quartzRarity
uncommonGeological Context
It is a secondary mineral found in aluminum-rich metamorphic rocks, hydrothermal veins, and phosphate-rich sedimentary rocks, often forming in association with limonite and other phosphate minerals.
