WebThe Throne of Jahangir (Urdu: Takht-i-Jahangir) was made of black onyx.It was built by Mughal emperor Jahangir (31 August 1569 – 28 October 1627) in 1602 and is located at the Diwan-i-Khas (hall of private audience) at the Red Fort in Agra, Uttar Pradesh, India.. Superstitions. The ancient Romans entered battle carrying amulets of sardonyx engraved …

WebIn gemology, chatoyancy (/ ʃ ə ˈ t ɔɪ. ə n s i / shə-TOY-ən-see), or chatoyance or cat's eye effect, is an optical reflectance effect seen in certain gemstones, woods, and carbon fibre.Coined from the French "œil de chat", meaning "cat's eye", chatoyancy arises either from the fibrous structure of a material, as in tiger's eye quartz, or from fibrous inclusions …

WebOtodus megalodon teeth are the largest of any shark, extinct or living, and are among the most sought after types of shark teeth in the world. This shark lived during the late Oligocene epoch and Neogene period, about 28 to 1.5 million years ago, and ranged to a maximum length of 60 ft. The smallest teeth are only 1.2 cm (0.5 in) in height, while the largest teeth …

WebLava is molten or partially molten rock that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F).The volcanic rock resulting from subsequent cooling is also …

WebTopaz is a silicate mineral of aluminium and fluorine with the chemical formula Al 2 Si O 4 (F,OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow orange.

WebA bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing. Beads range in size from under 1 millimetre (0.039 in) to over 1 centimetre (0.39 in) in diameter. Beads represent some of the earliest forms of jewellery, …

WebLapis lazuli (UK: / ˌ l æ p ɪ s ˈ l æ z (j) ʊ l i, ˈ l æ ʒ ʊ-,-ˌ l aɪ /; US: / ˈ l æ z (j) ə l i, ˈ l æ ʒ ə-,-ˌ l aɪ /), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.. As early as the 7th millennium BC, lapis lazuli was mined in the Sar-i Sang mines, in Shortugai, and in other ...

WebThe national plant is the shamrock (Trifolium dubium or Trifolium repens).. Fuchsia magellanica 'Riccartonii' (hummingbird fuchsia, hardy fuchsia; in Irish deora Dé, "tears of God") has sometimes been described as the national flower, despite not being a native plant.. Flax (Linum usitatissimum) is widely used as a symbol of Northern Ireland.It is the …

WebDiamond is a solid form of pure carbon with its atoms arranged in a crystal. Solid carbon comes in different forms known as allotropes depending on the type of chemical bond. The two most common allotropes of pure carbon are diamond and graphite.In graphite the bonds are sp 2 orbital hybrids and the atoms form in planes, with each bound to three …

WebA brilliant is a diamond or other gemstone cut in a particular form with numerous facets so as to have exceptional brilliance. The shape resembles that of a cone and provides maximized 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; …

WebWhen a gemstone is desired to be used in jewelry, it is cut depending on the size and shape of the rough stone, as well as the desired piece of jewelry to be made. As a general rule, a cut gemstone will reduce the mass (described in the carat) by about 50 percent.. There are several techniques available to work with gemstones; among them are sawing, …

WebThe colours and patterns of the heraldic palette are divided into three groups, usually known as metals, colours, and furs.. Metals. The metals are or and argent, representing gold and silver respectively, although in practice they are often depicted as yellow and white.. Or (Ger. Gelb, Gold, or golden) derives its name from the Latin aurum, "gold".It may be …

WebBronzite is a member of the pyroxene group of minerals, belonging with enstatite and hypersthene to the orthorhombic series of the group. Rather than a distinct species, it is really a ferriferous variety of enstatite, which owing to partial alteration has acquired a bronze-like sub-metallic luster on the cleavage surfaces.. Enstatite is magnesium silicate, …

WebCharoite K(Ca,Na) 2 Si 4 O 10 (OH,F)•H 2 O is a rare silicate mineral, first described in 1978.It was believed to be named after the Chara River, but due to the river being 70 km away from its discovery place, now it is believed to be named after the Russian word chary, meaning magic or charms. When it was discovered, it was thought to be a fake, dyed …