Minerals
A mineral is a naturally occurring chemical compound usually of crystalline form and not produced by life processes. A mineral has one specific chemical composition, whereas a rock can be an aggregate of different minerals or mineraloids. The study of minerals is called mineralogy. To meet the definition of “mineral” used by most geologists, a substance must meet five requirements:
Coal
Coal is a non-clastic sedimentary rock. They are the fossilized remains of plants and are in flammable black and brownish-black tones. Its main element...
Sericite
Sericite is a type of mineral that belongs to the mica group. It is a fine-grained, muscovite mica with a silky luster and is...
Limonite
Limonite is a mineral that is composed mainly of hydrated iron oxides, typically goethite and/or lepidocrocite, along with other minerals such as magnetite, hematite,...
Ajoite
Ajoite is a rare mineral that is known for its stunning blue-green color. It belongs to the silicate mineral group and is specifically classified...
Sugilite
Sugilite is a rare and captivating gemstone known for its vivid purple color and metaphysical properties. It is also sometimes referred to as "Luvulite"...
Vermiculite
Vermiculite is a naturally occurring mineral that has gained significant attention due to its unique properties and various applications. It is a hydrated, laminar,...
Citrine
Citrine is a yellow to brownish-yellow variety of quartz, which is a mineral composed of silicon and oxygen atoms. It is one of the...
Astrophyllite
Astrophyllite is a rare and unique mineral that belongs to the group of complex silicate minerals. Its name is derived from the Greek words...
Diamond
The hardest known mineral, diamond is pure carbon. Its crystals typically occur as octahedrons and cubes with rounded edges and slightly convex faces. Crystals may be transparent, translucent, or opaque. They range from colorless to black, with brown and yellow being the most common colors. Other forms include bort or boart (irregular or granular black diamond) and carbonado (microcrystalline masses).
Graphite
Graphite is like diamond, graphite is a form of native carbon crystalline with its atoms arranged in a hexagonal structure. Graphite is opaque and dark gray to black. It occurs as hexagonal crystals, flexible sheets, scales, or large masses.
Blue Opal
Blue opal is a captivating and unique gemstone known for its striking blue hues and captivating patterns. This semi-precious gemstone belongs to the opal...
Almandine
Almandine is a type of mineral that belongs to the garnet group, which is a diverse family of silicate minerals. Garnets are known for...
