Bild:Gold nugget (placer gold) (California, USA) (16839560358).jpg
Originaldatei (1.259 × 793 Pixel, Grött: 906 KB, MIME-Typ: image/jpeg)
Disse Datei warrt direkt vun Wikimedia Commons inbunnen. Angaven to'n Autor un de Lizenz staht op de Sied to de Datei bi Commons. |
Beschrieven
BeschrievungGold nugget (placer gold) (California, USA) (16839560358).jpg |
Large gold nugget (placer gold) from California, USA. (public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA) A mineral is a naturally-occurring, solid, inorganic, crystalline substrance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. Elements are fundamental substances of matter - matter that is composed of the same types of atoms. At present, 118 elements are known (four of them are still unnamed). Of these, 98 occur naturally on Earth (hydrogen to californium). Most of these occur in rocks & minerals, although some occur in very small, trace amounts. Only some elements occur in their native elemental state as minerals. To find a native element in nature, it must be relatively non-reactive and there must be some concentration process. Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state as minerals. Gold (Au) is the most prestigious metal known, but it's not the most valuable. Gold is the only metal that has a deep, rich, metallic yellow color. Almost all other metals are silvery-colored. Gold is very rare in crustal rocks - it averages about 5 ppb (parts per billion). Where gold has been concentrated, it occurs as wires, dendritic crystals, twisted sheets, octahedral crystals, and variably-shaped nuggets. It most commonly occurs in hydrothermal quartz veins, disseminated in some contact- & hydrothermal-metamorphic rocks, and in placer deposits. Placers are concentrations of heavy minerals in stream gravels or in cracks on bedrock-floored streams. Gold has a high specific gravity (about 19), so it easily accumulates in placer deposits. Its high density allows prospectors to readily collect placer gold by panning. In addition to its high density, gold has a high melting point (over 1000º C). Gold is also relatively soft - about 2.5 to 3 on the Mohs Hardness Scale. The use of pure gold or high-purity gold in jewelry is not desirable as it easily gets scratched. The addition of other metals to gold to increase the hardness also alters the unique color of gold. Gold jewelry made & sold in America doesn’t have the gorgeous rich color of high-purity gold. The gold sample shown above is a large natural nugget from a placer deposit in California. The discovery of gold nuggets in rivers and streams of California's Sierra Nevada foothills triggered the famous "Gold Rush" of 1848 and 1849. The gold is ultimately derived from quartz-gold hydrothermal veins in the bedrock of the Sierra Nevada Mountains of eastern California. |
Datum/Tiet | |
Born | Gold nugget (placer gold) (California, USA) |
Autor | James St. John |
Lizenz
- Du dröffst:
- wiedergeven – Kopien maken, an Annere wiedergeven un överdregen
- nee tohoopsetten – dat Wark verännern
- Ünner disse Bedingen:
- Naam nömen – Du musst den Naam von’n Autor oder von’n Afspraakgever in de von em fastleggte Wies nömen (aver nich so, dat dat utsüht, as wenn he di oder dien Gebruuk von dat Wark ünnerstütten deit).
Diese Bilddatei wurde ursprünglich auf Flickr durch jsj1771 in https://www.flickr.com/photos/47445767@N05/16839560358 hochgeladen. Sie wurde am 6. April 2015 durch den FlickreviewR-Bot geprüft und die Lizenzierung der Datei unter den Bedingungen von cc-by-2.0 wurde bestätigt. |
6. April 2015
In dieser Datei abgebildete Objekte
wiest
Einige Werte ohne einen Wikidata-Eintrag
Urheberrechtsstatus Düütsch
urheberrechtlich geschützt Düütsch
aufgenommen mit Düütsch
Nikon D70s Düütsch
21. Jul. 2006
Belichtungszeit Düütsch
0,008 Sekunn
Blendenzahl Düütsch
5,6
Brennweite Düütsch
52 Millimeter
ISO-Wert Düütsch
200
Datei-Historie
Klick op de Tiet, dat du de Datei ankieken kannst, so as se do utseeg.
Datum/Tiet | Duumnagelbild | Grött | Bruker | Kommentoor | |
---|---|---|---|---|---|
aktuell | 22:34, 6. Apr. 2015 | 1.259 × 793 (906 KB) | Jacopo Werther | Transferred from Flickr via Flickr2Commons |
Dateibruuk
Disse Sied bruukt dit Bild:
Metadaten
Disse Datei bargt noch mehr Informatschonen, de mehrsttiets vun de Digitalkamera oder den Scanner kaamt. Dör Afännern vun de Originaldatei köönt welk Details nich mehr ganz to dat Bild passen.
Kamera-Hersteller | NIKON CORPORATION |
---|---|
Kameramodell | NIKON D70s |
Belichtungstiet | 1/125 Sek. (0,008) |
F-Nummer | f/5,6 |
Film- oder Sensorempfindlichkeit (ISO) | 200 |
Tiet vun de Opnahm | 10:52, 21. Jul. 2006 |
Brennwied | 52 mm |
Breed | 3.008 px |
Hööchd | 2.000 px |
Bits je Farvkomponent |
|
Pixeltohoopsetzung | RGB |
Utrichtung | Normal |
Komponententall | 3 |
Oplösen in de Breed | 300 dpi |
Oplösen in de Hööchd | 300 dpi |
bruukte Software | Adobe Photoshop Elements 13.0 (Macintosh) |
Spiekertiet | 02:34, 4. Apr. 2015 |
Y un C Positionerung | Benachbart |
Belichtungsprogramm | Unbekannt |
Exif-Version | 2.21 |
Tiet vun dat digital Maken | 10:52, 21. Jul. 2006 |
Bedüden vun elk Kumponent |
|
Komprimeerte Bits je Pixel | 4 |
Belichttiet | 6,965784 |
Blennweert | 4,970854 |
Belichtungsvörgaav | 0 |
Gröttste Blenn | 4,3 APEX (f/4,44) |
Meetmethood | Munster |
Lichtborn | unbekannt |
Blitz | Blitz utlööst, Reflexion vun’n Blitz faststellt, Auto |
Spiekertiet (1/100 s) | 70 |
Tiet vun de Opnahm (1/100 s) | 70 |
Tiet digital maakt (1/100 s) | 70 |
ünnerstütt Flashpix-Version | 1 |
Farvruum | sRGB |
Meetmethood | Een-Chip-Farvsensor |
Dateiborn | Digitale Standbildkamera |
Szenentyp | Normal |
Anpasst Bildverarbeidung | Standard |
Belichtungsmodus | Automaatsch Belichtung |
Wittutgliek | Automaatsch Wittutgliek |
Digitalzoom | 1 |
Brennwied (Kleenbildäquivalent) | 78 mm |
Opnahmoort | Standard |
Verstärkung | Keen |
Kontrast | Normal |
Sättigung | Normal |
Schärp | Normal |
Motivafstand | unbekannt |
Seriennummer der Kamera | 1004a0cc |
Verwendetes Objektiv | 18.0-70.0 mm f/3.5-4.5 |
Datum, zu dem die Metadaten letztmalig geändert wurden | 22:34, 3. Apr. 2015 |
Eindeutige Kennung des ursprünglichen Dokuments | 70720D4546EE68ED5A64618D5472886D |