Natural cacoxenite contains one aluminum group for every 17 phosphates making the larger formula more accurate, if not less cumbersome. Luster is vitreous to silky. Specimens are translucent to transparent. Crystal System is hexagonal. Crystal Habits include acicular radiating crystals often as inclusions, also massive, globular, botryoidal and fibrous tufts.
Cleavage is poor.
Fracture is fibrous. Streak is yellow. Associated Minerals include quartz , hematite , strengite , beraunite , rockbridgeite and limonite . Best Field Indicators are crystal habit, color, associations, density and streak.