Civil Rights
Movements, leaders, victories and the continuing fight for equality.
Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
A gemstone is a piece of mineral crystal or rock used to make jewelry or other adornments.
Gemstone or gemstones may also refer to:
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
A gemstone is a piece of mineral crystal or rock used to make jewelry or other adornments. Gemstone or gemstones may also refer to: Gemstone (database), or GemStone/S, commercial software by GemStone Systems GemStone IV, GemStone III and GemStone II, multiplayer online role-playing video games Gemstone Publishing, an American company Gemstones (album) by Adam Green, 2005 Gemstones (rapper) (Demarco Lamonte Castle, born 1981) Operation Gemstone, a planned series of clandestine acts leading to the Watergate burglary
A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments. Certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) may also be used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some softer minerals such as brazilianite may be used in jewelry because of their color, luster, or other physical properties that have aesthetic value. However, generally speaking, soft minerals are not typically used as gemstones by virtue of their brittleness and lack of durability. Found all over the world, the industry of coloured gemstones (i.e. gemstones other than diamonds) is currently estimated at US$1.55 billion as of 2023 and is projected to steadily increase to a value of $4.46 billion by 2033. A gem expert is a gemologist, a gem maker is called a lapidarist or gemcutter, and a diamond cutter is called a diamantaire.
A brilliant is a diamond or other gemstone cut in a particular style with 57-58 facets so as to have exceptional brilliance. The word 'brilliant' is often used for diamonds cut in this style that are round in shape, also known as 'round brilliant cut' or 'standard brilliant cut.' The underside is conical, a shape that provides maximal light return through the top of the diamond. Even with modern techniques, the cutting and polishing of a diamond crystal always results in a dramatic loss of weight; rarely is this loss less than 50%. The round brilliant cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal. Oddly-shaped crystals such as macles are more likely to be cut in a fancy cut—that is, a cut other than the round brilliant—which the particular crystal shape lends itself to.
Moonstone is a sodium potassium aluminium silicate ((Na,K)AlSi3O8) of the feldspar group that displays a pearly and opalescent schiller. An alternative name for moonstone is hecatolite (from goddess Hecate).
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Madam C.J. Walker