However, kernite is harder and forms splintery cleavage fragments. Specimens of kernite are interesting, and can make a good addition to one's collection. Color is white or gray to colorless. Luster is vitreous to greasy. Transparency crystals are transparent to translucent.
Cleavage is perfect in two directions forming splintery fragments.
Fracture is splintery due to cleavage. Streak is white. Associated Minerals are borax , ulexite , hydroboracite and other borate minerals . Best Field Indicators are crystal habit, associations, locality, density, splintery cleavage, and hardness.