Druse can refer to:
Director may refer to:
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.
MBE may refer to:
Cleavage may refer to:
A vug, vugh, or vugg is a small- to medium-sized cavity inside rock. It may be formed through a variety of processes. Most commonly, cracks and fissures opened by tectonic activity are partially filled by quartz, calcite, and other secondary minerals. Open spaces within breccias formed by an ancient collapse are another important source of vugs.
Crystal Palace may refer to:
Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.
A crystal is a form of solid matter whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern.
Valentinite is an antimony oxide mineral with formula Sb2O3. Valentinite crystallizes in the orthorhombic system and typically forms as radiating clusters of euhedral crystals or as fibrous masses. It is colorless to white with occasional shades or tints of yellow and red. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 5.76. Valentinite occurs as a weathering product of stibnite and other antimony minerals. It is dimorphous with the isometric antimony oxide senarmontite.
Crystal Cave may refer to:
Fersman Mineralogical Museum is one of the largest mineral museums of the world, located in Moscow, Russia. Its collections include more than 135,000 items. Among them natural crystals, geodes, druses and other kinds of mineral treasures. The museum was named after Alexander Fersman.
Tofieldia pusilla is a species of flowering plant in the family Tofieldiaceae. It is also sometimes placed in the lily family, Liliaceae. Its common name is Scottish asphodel in Europe, and Scotch false asphodel in North America. The plant is native to northern North America and parts of Eurasia, its circumpolar distribution extending across Canada and the northern United States to Greenland, Iceland and northern Europe.
A druse is a group of crystals of calcium oxalate, silicates, or carbonates present in plants, and are thought to be a defense against herbivory due to their toxicity. Calcium oxalate (Ca(COO)2, CaOx) crystals are found in algae, angiosperms and gymnosperms in more than 215 families. These plants accumulate oxalate in the range of 3–80% (w/w) of their dry weight through a biomineralization process in a variety of shapes. Araceae have numerous druses, multi-crystal druses and needle-shaped raphide crystals of CaOx present in the tissue. Druses are also found in leaves and bud scales of Prunus, Rosa, Allium, Vitis, Morus and Phaseolus.
A crystal cluster is a group of crystals which are formed in an open space environment and exhibit euhedral crystal form determined by their internal crystal structure. A cluster of small crystals coating the walls of a cavity are called druse.
In geology and mineralogy, druse is a crystal habit represented by the coating of fine crystals on a rock fracture surface, or vein or within a vug or geode.
Langite is a rare hydrated copper sulfate mineral, with hydroxyl, found almost exclusively in druses of small crystals. It is formed from the oxidation of copper sulfides, and was first described in specimens from Cornwall, United Kingdom. It is dimorphous with wroewolfeite. Langite was discovered in 1864 and named after the physicist and crystallographer Viktor von Lang (1838–1921), who was Professor of Physics at the University of Vienna, Austria.
An idioblast is an isolated plant cell that differs from neighboring tissues. They have various functions such as storage of reserves, excretory materials, pigments, and minerals. They could contain oil, latex, gum, resin, tannin, or pigments etc. Some can contain mineral crystals such as acrid tasting and poisonous calcium oxalate, carbonate, or silica. Any of the tissue or tissue systems of plants can contain idioblasts. Idioblasts are divided into three main categories: excretory, tracheoid, and sclerenchymatous.
The term isometric comes from the Greek for "having equal measurement".
The World for Sale is a 1918 American silent drama film directed by J. Stuart Blackton and starring Conway Tearle, Ann Little, W.W. Bitner, Norbert Wicki, Crazy Thunder, and E.L. Fernandez. It is based on the 1916 novel The World For Sale by Gilbert Parker. The film was released on January 21, 1918, by Paramount Pictures. It is not known whether the film currently survives, and it may be a lost film.
The Return of the Druses is a tragedy in blank verse by Robert Browning. It was originally published as the fourth number of Bells and Pomegranates in 1843. The manuscript was first named Mansoor the Hierophant.