Pyrite tumbled

Mookaite tumbled is a popular stone, valued for its highly contrasting patterns of brightest yellow, brown, orange, red, and maroon. Sourced in Western Australia, in the Carnarvon Basin, and extremely difficult to mine, mookaite tumbled can be cut, polished, and carved. It is often cut into beads and used with jewelry.

Petalite, also known as castorite, is a lithium aluminium phyllosilicate mineral LiAlSi4O10, crystallizing in the monoclinic system. Petalite occurs as colorless, pink, grey, yellow, yellow grey, to white tabular crystals and columnar masses. Occurs in lithium-bearing pegmatites with spodumene, lepidolite, and tourmaline. Petalite is an important ore of lithium, and is converted to spodumene and quartz by heating to ~500 °C and under 3 kbar of pressure in the presence of a dense hydrous alkali borosilicate fluid with a minor carbonate component. Petalite (and secondary spodumen formed from it) is lower in iron than primary spodumen making it a more useful source of lithium in e.g. the production of glass. The colorless varieties are often used as gemstones.

Known as the birthstone of February, banded Amethyst is a polished, semi-precious stone that is prized for its alternating bands of purple and white. This gem is actually a combination of Amethyst and pure Quartz and it's also known as Chevron Amethyst. Some portions are translucent.