Stellerite

Mordenite is a unique-looking mineral that can be white, pink, yellow, or colorless. Most notably, this mineral has transparent or translucent fibrous crystals that create a spiderweb effect. Mordenite can be found in some igneous rocks, which are rocks that solidified from molten rock. This mineral was named after its place of discovery, Morden, Nova Scotia.

Rainbow Hematite tumbled has an iridescent aspect, giving it the illusion of rainbow colors. It is very attractive and popular for its novelty value. Found across the world, rainbow Hematite tumbled is now mainly mined in Brazil, China, Australia, North America, and South Africa. A man-made coating is responsible for the iridescent shine.

Glauberite is a monoclinic sodium calcium sulfate mineral with the formula Na2Ca(SO4)2. It was first described in 1808 for material from the El Castellar Mine, Villarrubia de Santiago, Toledo, Castile-La Mancha, Spain. It was named for the extracted Glauber's salts after the German alchemist Johann Rudolf Glauber (1604–1668). Glauberite often forms in continental and marine evaporite deposits, but may also form from hydrothermal deposits, as mineral sublimates deposited near fumaroles, in amygdules in basalt, and in nitrate deposits in arid climates. It occurs associated with halite, polyhalite, anhydrite, gypsum, thenardite, mirabilite, sassolite and blodite. Because of its solubility, glauberite is often dissolved away from the crystal matrix leaving a distinctly shaped hollow cast. Its mineral composition is readily altered into other minerals as pseudomorphs. Gypsum pseudomorphs are common due to increased humidity. Glauberite, its cast impressions, and its pseudomorphed crystals are often easily recognizable due to its common crystal twinning, and crystal habit displayed by uniquely shaped flattened, often seeming rhombohedral, large individual 'floater crystals'. The mineral is commercially mined for its sulfate contents.