These crystals are beautiful; prismatic hexagonal and rather translucent.
This is an evaporite mineral. It contains sodium and often forms in association with halite. Its is a sulphate but very unusually, it also contains carbonate ions. Some hanksite specimens are also fluorescent under both long and short wave UV. Sadly, we aren't able to check if these samples are fluorescent right now.
30g. All prices are per item. Photographs are representative of the items on offer, but the item you buy may not be the one in the photograph.