Lazulite
Crystal Encyclopedia
Lazulite is a rare mineral that belongs to the phosphate class, characterized by its striking blue color. Its name is derived from the Persian word “lazhward,” which refers to a blue color. Lazulite typically occurs…
Orbicular Jasper
Crystal Encyclopedia
Orbicular jasper is a variety of jasper, a type of chalcedony, known for its distinctive orb-like patterns. These patterns can vary in size, color, and arrangement, creating unique and visually striking stones. Orbicular…
Eye Agate
Crystal Encyclopedia
Eye agate is a unique variety of agate, a form of chalcedony, known for its distinctive patterns resembling eyes. These eye-like formations, often called “agate eyes,” are concentric circles or bands that form within…
Bi-color Tourmaline
Crystal Encyclopedia
Bi-color tourmaline is a unique variety of the tourmaline family that exhibits two or more distinct colors within a single crystal. These colors can range from pink and green to blue and yellow, and the transition between…
Arizona Rainbow Petrified Wood
Crystal Encyclopedia
Petrified wood is essentially fossilized wood where all the organic materials have been replaced with minerals, usually silicates such as quartz, while retaining the original structure of the wood. This process occurs over…
Watermelon Tourmaline
Crystal Encyclopedia
Watermelon tourmaline is a strikingly beautiful variety of the mineral tourmaline, renowned for its distinctive color gradient that resembles a slice of watermelon. This gemstone is highly prized for its unique appearance,…
Wollastonite
Crystal Encyclopedia Wollastonite
Wollastonite
Wollastonite is a group of innosilicate mineral, formula is CaSiO3 that may inlude small amount of magnesium, manganese and iron substituting for calcium. A valuable industrial mineral, wollastonite is white, gray,…
Cavansite
Crystal EncyclopediaCavansite is a relatively rare and striking mineral known for its vibrant blue color. The name “cavansite” is derived from its chemical composition, as it contains calcium (Ca), vanadium (V), and silicon (Si). The mineral is typically found in crystal…
Olivine
Crystal EncyclopediaOlivine is one of the most common minerals within the earth, and is a prime rock forming mineral. Despite this, desirable specimens and huge crystals are unusual and fashionable. Only few localities yield large examples of this mineral, even though small…
Sillimanite
Crystal EncyclopediaSillimanite is a mineral that belongs to the group of aluminosilicate minerals known as the sillimanite group. It is named after the American chemist Benjamin Silliman Jr., who first described the mineral in 1854. Sillimanite has the chemical formula…
Kaolinite
Crystal Encyclopedia
Kaolinite Mineral Rock
Kaolinite sample from Twiggs County, Georgia, USA. This sample is from the Cretaceous rocks of Georgia
Kaolinite is a clay mineral with chemical composition Al2Si2O5(OH)4. It is an important industrial mineral. Rocks…
Tremolite
Crystal Encyclopedia Tremolite,Campolungo, Piumogna Valley, Switzerland
Tremolite from Franklin, Sussex Co., New Jersey, United States
Tremolite is a silicate mineral and member of the amphibole group. Chemical formula is Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2.…