Hyalite Sml Wulfenite and Mimetite pyrite is an abundant sulfide

pyrite is an abundant sulfide mineral that despite some similarities can easily be distinguished from actual gold by its crystal form (typically cuboidal) and being much harder whereas gold is soft and malleable

and because of this they are one of the most frequently found vertebrate fossils on earth

Chalcedony has a number of forms that are also considered gems of their own

and is one of the more common gems although pieces of exceptional hue and clarity are considered fairly rare and can be extremely valuable

Hyalite Sml Wulfenite and Mimetite pyrite is an abundant sulfideHyalite or Jalite is a form of opal that due to its chemical composition lacks the sought after colorful iridescence of its more sought after precious stone relative. Hyalite is unique in its own right, however, especially due to its highly fluorescent or UV reactive nature. Typically found in intricate, botryoidal crystal formations, Hyalite is usually clear but can have some color due to the presence of impurities.