Eventually the concentration is so great that crystals of borax and other boron minerals form. Color is white to clear. Luster is vitreous. Transparency crystals are transparent to translucent. Also massive and as crusts.
Cleavage is perfect in one direction.
Fracture is conchoidal. Streak is white. Associated Minerals are calcite , halite , hanksite , colemanite , ulexite and other borates. Best Field Indicators are crystal habit, color, associations, locality, density and hardness.