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gold
Gold is a chemical element with symbol Au (from Latin: aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable and ductile metal. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements, and is solid under standard conditions. The metal therefore occurs often in free elemental (native) form, as nuggets or grains, in rocks, in veins and in alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum) and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides).
Gold's atomic number of 79 makes it one of the higher atomic number elements that occur naturally in the universe. It is thought to have been produced in supernova nucleosynthesis and from the collision of neutron stars and to have been present in the dust from which the Solar System formed. Because the Earth was molten when it was just formed, almost all of the gold present in the early Earth probably sank into the planetary core. Therefore, most of the gold that is present today in the Earth's crust and mantle is thought to have been delivered to Earth later, by asteroid impacts during the late heavy bombardment, about 4 billion years ago.
Gold resists attacks by individual acids, but it can be dissolved by aqua regia (nitro-hydrochloric acid, literally "royal water"). The acid mixture causes the formation of a soluble gold tetrachloride anion. Gold metal also dissolves in alkaline solutions of cyanide, which are used in mining and electroplating. It is insoluble in nitric acid, which dissolves silver and base metals, a property that has long been used to refine gold and to confirm the presence of gold in items, giving rise to the term acid test; it dissolves in mercury, though, forming amalgam alloys, but this is not a chemical reaction.
This metal has been a valuable and highly sought-after precious metal for coinage, jewelry, and other arts since long before the beginning of recorded history. In the past, a gold standard was often implemented as a monetary policy within and between nations, but gold coins ceased to be minted as a circulating currency in the 1930s, and the world gold standard was finally abandoned for a fiat currency system after 1976. The historical value of gold was rooted in its medium rarity, easy handling and minting, easy smelting, corrosion resistance, distinct color, and non-reactivity to other elements.
A total of 183,600 tonnes of gold is in existence above ground, as of 2014. This is equivalent to 9513 m3 of gold. The world consumption of new gold produced is about 50% in jewelry, 40% in investments, and 10% in industry. Gold's high malleability, ductility, resistance to corrosion and most other chemical reactions, and conductivity of electricity have led to its continued use in corrosion resistant electrical connectors in all types of computerized devices (its chief industrial use). Gold is also used in infrared shielding, colored-glass production, gold leafing, and tooth restoration. Certain gold salts are still used as anti-inflammatories in medicine.
SOLD Thanks for Looking This is a Leupold 15x30x50mm Gold Ring Spotting Scope, it is in very good condition. Comes with the soft case. If you have not looked through one of these, do yourself a favor and check one out.
350.00 Shipped Thanks for looking !
Hello up for sale is my .9999 24k necklace I purchased at Van tin jewelry in Portland a little over a year ago.
Its a 3 baht which means for every baht there is 15 grams so this weighs 45 grams of pure gold. Necklace is 24 1/4 inches . I paid $2,330 only cause I’ve spent a lot in this store...
1976 Remington Bolt action Model 788 in .243 Winchester caliber. All original factory condition except for a glass bedding job by a riflesmith. Blue steel, hardwood stock. Detachable steel, 3 shot magazine, 22 inch barrel. Although it had iron sights, they are no longer on the rifle and are...
Selling a rare Kimber Royal II USMC limited edition pistol with 24k gold & silver engraving.
Only 200 of these were ever made, it has a special serial number KMARINE9.
I bought this new and it has never been fired, it is in mint condition. It has remained in the safe except for periodic...
Like new. Have had for one year, used once for the range atop a CZ 17 hmr rifle. Original factory box and all paperwork, has a Leupold protective scope neoprene cover. Leupold is made in the USA here in Beaverton, Oregon. Has a no fault transferrable warranty.
In the Camas/Vancouver, Wa. area...
I have 2 boxes of 50 of the .40 Smith & Wesson Gold Dot. I don't have a .40 S&W...
Local gun shops have this in boxes of 20.
Cash offers
Looking to trade for 9mm or 45ACP ammo. Would also trade for Glock 17/19 9mm mags, paper targets, FNX-45 Tactical holster, . In the Woodinville /...
Looking to sell a Millett Buck Gold Varmint Target Special. It is a 6-25x56 optic with a 30mm tube. It is like new in the box with some very light handling marks on the zoom adjustment lever and on the threads for the sunshade. It does not appear to have ever been mounted to a rifle. Comes with...
Selling 180 rounds of Federal Premium gold medal 308 win 168 grain Sierra Match Kings bthp for $175 as lot . Can meet in Gresham, Portland or Sherwood. Message me if interested.
Now that I have my order placed I'm sharing with you.
500 round case for $417 that's .83 per bang.
500 round case - 308 Federal Gold Medal Match 168 grain BTHP Ammo GM308M-500 | SGAmmo.com
Beautiful and like new 2005 Colt Gold Cup Trophy. Has been shot about 25 rounds since new. I've had the Crimson Trace grip laser installed ($359 retail) and has the Kimber .22LR slide to go along. Comes with original grips and everything in the box. Kimber .22LR comes in a plastic box...