It is an extremely unusual mineral just by its chemistry alone. Coconinoite is interesting for its good fluorescence under UV light as well. Remember, this is also a radioactive mineral and should be stored away from other minerals that are affected by radioactivity and human exposure should always be limited.
Colors are various shades of pale yellow.
Luster is vitreous or waxy to dull or earthy. Transparency crystals are translucent. Crystal System is orthorhombic or possibly monoclinic. Crystal Habits include crusts, earthy masses, foliated and scaly aggregates. Streak is pale yellow.