But a closer inspection reveals the only difference being two more water molecules in laueite's formula. Those two water molecules make a difference in the structure and a difference in the crystal habit of the two minerals. Laueite forms tabular crystals in contrast to strunzite's acicular or hair-like crystals. Color is bright straw yellow to brown-yellow or brown. Luster is vitreous to silky.
Specimens are translucent to transparent.
Crystal Habits include acicular to fibrous crystals in radiating sprays and in fibrous crusts. Cleavage is absent. Fracture is uneven. Streak is white. Associated Minerals include limonite , triphylite , rockbridgeite , beraunite , laueite and other phosphate minerals.