Physics

Putnisite Definition The mineral, named putnisite, appears purple and translucent, and contains strontium, calcium, chromium, sulphur, carbon, oxygen and hydrogen, a very unusual combination. It…

Tourmaline Definition Tourmaline is Any of several minerals having the general chemical formula (Na,Ca)(Mg,Fe,Al,Li)3 Al6 (BO3)3 Si6 O18 (OH)4 . Tourmaline occurs in many different…

Spodumene Definition Spodumene is a greyish-white, green, or lilac pyroxene mineral consisting of lithium aluminium silicate in monoclinic crystalline form. It’s formula: LiAlSi 2O6. It…

Hypersthene Definition Hypersthene is a green, brown, or black pyroxene mineral consisting of magnesium iron silicate in orthorhombic crystalline form. It is a common rock-forming…

Beryl Definition Beryl is a usually green or bluish-green hexagonal mineral occurring as transparent to translucent prisms in igneous and metamorphic rocks. Transparent varieties, such…

Amethyst Definition Amethyst is a purple or violet, transparent form of quartz used as a gemstone. The color is caused by the presence of iron…

Amphibole Definition Amphibole is any of a large group of usually dark minerals composed of a silicate joined to various metals, such as magnesium, iron,…

Granite Definition Granite is a usually light-colored, coarse-grained igneous rock consisting mostly of quartz, orthoclase feldspar, sodium-rich plagioclase feldspar, and micas. This popular rock has…

Thermodynamics deals with the transformations of the energy in a system and between the system and its environment. Hence, it is involved in every atmospheric…

Rhyolite Definition Rhyolite is a usually light-colored, fine-grained extrusive igneous rock that is compositionally similar to granite. It often includes flow lines formed during the…

Volcanic Ash Definition Volcanic ash is a combination of fine particles made of rock, tiny strands of supercooled lava called volcanic glass, and minerals. It…

Silica Fume Definition Silica fume is a co-product from the production of silicon or ferrosilicon metal. Silica fume is a mineral admixture, a very fine…