Okenite

Aegirine is commonly found in volcanic rock formed near seawater, and was named after a Scandinavian sea god, Aegir. The slender, prism-shaped crystals are highly sought after by collectors. It is most commonly found in the United States, predominately in quarries of Arkansas.

Ancestralite is a trading, commercial name for a dark grey or rusty stone found in the Minas Gerais mine in Brazil. Reportedly, the material is a pseudomorph of martite, which is known as a variety of hematite.

Pyromorphite, its named derived from the Greek word for "fire", is an uncommon and distinctive mineral. Many pyromorphite specimens bear striking yellow, green, or chartreuse colorations and impressive crystal structures. While there are few commercial uses for this mineral, attractive specimens are sought after by collectors.

Pyrolusite is incredibly rich in manganese and is the most readily used mineral from which to obtain it. Manganese has a wide range of industrial uses, ranging from creating massive steel beams to dying fabric. Pyrolusite is found worldwide, commonly in huge masses called wads, which are almost coal-like in appearance.

Gypsum is a very common and abundant mineral that has numerous uses including soil conditioning, manufacturing of cement, or making classroom chalks. Its granular variety, Alabaster, has been used for vases, bowls, and other decorative objects for thousands of years. Gypsum forms very unique crystals - the Cave of the Crystals in Mexico features giant ones, the largest being 12 m long and 4 m wide.

Hedenbergite is a rock forming mineral found primarily in metamorphic rocks. Its dark green to black color and can have a striking bright luster. Though not necessarily an uncommon mineral, good crystals are rare. Specimens that show good color and luster along with nice crystals are prized by mineral collectors.

Boji Stone is a trade name for stones that come from a specific site in the state of Kansas, USA. Also known as Kansas Pop Rocks, these stones are found in the base of a naturally formed pyramid mountain. They mainly consist of pyrite and marcasite and are usually sold as beads or tumbled stones.

Trolleite Quartz is a rare variety of quartz known for its unique blue-green coloration, caused by inclusions of the mineral Trolleite. It is named after the Swedish chemist and mineralogist Hans Gabriel Trolle-Wachtmeister, who discovered it in the 19th century. Initially, trolleite Quartz was thought to be exclusive to Sweden's Vastana mine, making it an exceptionally rare gemstone. However, further exploration led to the discovery of additional sources, expanding its availability to some extent. Presently, one of the prominent locations for trolleite Quartz mining is the Minas Gerais region in Brazil.