Amethyst crystal is one of several varieties of quartz, which gives it a crystal trigonal system. It's lavender to violet shade is the result of iron and aluminum deposits, as well as natural irradiation. Amethyst stone is made up of silicon dioxide. Amethyst has often been one of the most popular stones in the world.
Pyrite is a brass-yellow mineral with a bright metallic luster. It has a chemical composition of iron sulfide (FeS2) and is the most common sulfide mineral. It forms at high and low temperatures and occurs, usually in small quantities, in igneous, metamorphic, and sedimentary rocks worldwide.
A Druzy is formed when ground water carrying dissolved silica is forced into a porous area of the rock, rapid cooling often occurs, causing the formation of tiny crystals on the surfaces or in cavities of the rock. The clear crystals often form on top of previously deposited minerals.
Quartz is one of the most popular minerals in the world. Quartz is composed of silicon and oxygen atoms in a continuous framework
of SiO4 silicon–oxygentetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. These Quartz pieces were mined in the USA.
The mineral pyrite, oriron pyrite, also known as fool’s gold, is aniron sulfidewith the chemical formula FeS2 (iron(II) disulfide). These gorgeous Pyrite Cubes were mind by hand from a single Mountain in Spain where there are only 3 veins that have access to these gorgeous Pyrite cubes. The Pyrite cubes develop naturally into these almost perfect symmetrical cubes and are not man made.
Smoky Quartz is a grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal. Like other quartz gems, it is a silicon dioxide crystal. The smoky color results from free silicon formed from the silicon dioxide by natural irradiation.