Sterling Repousse

27 September 2010

Sterling Repousse

Precious metal

Bullion

A 500 gram silver bullion bar produced by Johnson Matthey

American Platinum Eagle bullion coin

A metal is deemed to be precious if it is rare. The discovery of new sources of ore or improvements in mining or refining processes may cause the value of a precious metal to diminish. The status of a "precious" metal can also be determined by high demand or market value. Precious metals in bulk form are known as bullion, and are traded on commodity markets. Bullion metals may be cast into ingots, or minted into coins. The defining attribute of bullion is that it is valued by its mass and purity rather than by a face value as money.

Many nations mint bullion coins. Although nominally issued as legal tender, these coins' face value as currency is far below that of their value as bullion. For instance, Canada mints a gold bullion coin (the Gold Maple Leaf) at a face value of $50 containing one troy ounce (31.1035 g) of golds of July 2009, this coin is worth about $1,075 as bullion.[citation needed] Bullion coins' minting by national governments gives them some numismatic value in addition to their bullion value, as well as certifying their purity.

Silver 1000oz bar

The level of purity varies from issue to issue. 99.9% purity is common. The purest mass-produced bullion coins are in the Canadian Gold Maple Leaf series, which go up to 99.999% purity. Note that a 100% pure bullion is not possible, as absolute purity in extracted and refined metals can only be asymptotically approached. Many bullion coins contain a stated quantity (such as one troy ounce) of the marginally-impure alloy. In contrast, the Krugerrand is one of many historic and modern bullion coins of 22 Kt Crown gold, with a stated content (usually one troy ounce) of "fine gold"[clarification needed (define)], with the other component(s) of the alloy making the coin heavier than one ounce in total. Still more bullion coins (for example: British Sovereign) state neither the purity nor the fine-gold weight on the coin, but are recognized and consistent in their composition,[citation needed] and many historically stated a denomination in currency (example: American Double Eagle).

One of the largest bullion coins in the world is the 10,000 dollar Australian Gold Nugget coin minted in Australia which consists of a full kilogram of 99.9% pure gold. There have been a small number of larger bullion coins, but they are impractical to handle and not produced in mass quantities. China has produced coins in very limited quantities (less than 20 pieces minted) that exceed 260 troy ounces (8 kg) of gold.[citation needed] Austria has minted a coin containing 31 kg of gold (the Vienna Philharmonic Coin minted in 2004 with a face value of 100,000 euro). As a stunt to publicise the 99.999% pure one-ounce Canadian Gold Maple Leaf series, in 2007 the Royal Canadian Mint made a 100 kg 99.999% gold coin, with a face value of $ 1 million, and now manufactures them to order, but at a substantial premium over the market value of the gold.

Gold and silver are often seen as hedges against both inflation and economic downturn. Silver coins have become popular with collectors due to their relative affordability, and unlike most gold and platinum issues which are valued based upon the markets, silver issues are more often valued as collectables, far higher than their actual bullion value. PAMP (Produits Artistiques Metaux Precieux) CH-6874, Castel San Pietro, Switzerland deals with Gold Bullion of metal Fineness : 995.0 RAND Refinery Limited, Germiston, South Africa also deal with Gold Bullion of metal fineness : 995.0

Aluminium

An example of a precious metal that is now common is that of aluminium. Although aluminium is one of the most commonly occurring elements on Earth, it was at one time found to be exceedingly difficult to extract from its various ores. This made the little available pure aluminium, which had been refined at great expense, more valuable than gold. Bars of aluminium were exhibited alongside the French crown jewels at the Exposition Universelle of 1855[citation needed], and Napoleon III's most important guests were given aluminium cutlery, while those less worthy dined with mere silver. Additionally, the pyramidal top to the Washington Monument is made of pure aluminium. At the time of the monument's construction, aluminium was as expensive as silver. Over time, however, the price of the metal has dropped; the invention of the Hall-Hroult process in 1886 caused the high price of aluminium to permanently collapse[citation needed].

Bismuth and tellurium

Bismuth and tellurium are the only two metals which have abundances less than 10-8 by mass part (g/g) in the Earth's crust, but which are currently not of high economic value.[citation needed]

Rough world market prices

Valuable metal prices containing all precious metals names in bold

metal

mass abundance

price 2009-04-10

price 2009-07-22

price 2010-01-07[citation needed]

Platinum

5 ppb

42681 $/kg

37650 $/kg

49995 $/kg

Rhodium

1 ppb

39680 $/kg

46200 $/kg

88415 $/kg

Gold

4 ppb

31100 $/kg

30590 $/kg

3637 $/kg

Iridium

1 ppb

14100 $/kg

12960 $/kg

13117 $/kg

Osmium

1.5 ppb

13400 $/kg

12200 $/kg

12217 $/kg

Palladium

15 ppb

8430 $/kg

8140 $/kg

13632 $/kg

Rhenium

0.7 ppb

7400 $/kg

7000 $/kg

6250 $/kg

Ruthenium

1 ppb

2290 $/kg

2730 $/kg

5562 $/kg

Germanium

1500 ppb

1050 $/kg

1038 $/kg

Beryllium

2800 ppb

850 $/kg[citation needed]

Silver

75 ppb

437 $/kg

439 $/kg

588 $/kg

Gallium

19000 ppb

425 $/kg

413 $/kg

Indium

250 ppb

325 $/kg

520 $/kg

Tellurium

1 ppb

158.7 $/kg

Mercury

85 ppb

18.9 $/kg

15.95 $/kg

Bismuth

8.5 ppb

15.4 $/kg

18.19 $/kg

See also

Bullion coin

Gold as an investment

Silver as an investment

Palladium as an investment

Platinum as an investment

Noble metal

Gemstone

Hallmark

Ingot

Taxation of precious metals

Troy weight

Metal as money

Northwest Territorial Mint

Synthesis of noble metals

References

^ Platinum Guild: Applications Beyond Expectation

^ Gold bullion facts from freegoldtips.com

^ a b Aluminum: Common Metal, Uncommon Past, Chemical Heritage NewsMagazine, Winter 2007/8, Vol.27, No.4

^ George J. Binczewski (1995). "The Point of a Monument: A History of the Aluminum Cap of the Washington Monument". JOM 47 (11): 2025. http://www.tms.org/pubs/journals/JOM/9511/Binczewski-9511.html.

^ The abundance of the element, a measure for its rarity, is given in mass fraction as kg/kg in the earth's crust (CRC Handbook). David R. Lide, ed (2005). "Section 14, Geophysics, Astronomy, and Acoustics; Abundance of Elements in the Earth's Crust and in the Sea". CRC Handbook of Chemistry and Physics (85 ed.). Boca Raton, Florida: CRC Press.

^ All given prices from 10th April 2009 are taken mostly from London Metal Exchange.

^ Data from 22nd of July 2009 are from the thebulliondesk.com[clarification needed (URL?)] taken, except as noted.

^ a b c The metal prices of gallium, germanium, and indium are taken from MinorMetals.com as examples of modern precious metals used for investment / speculation.

External links

Sources of current metal prices

Online realtime prices of precious metals from thebulliondesk.com

One year price charts for minor metals

Kitco Current Metal Prices

Spyker International Bullion Services

Measurements and Conversions of Precious metals

Organisations

International Precious Metals Institute

v d e

Jewellery

Forms

Anklet Belt buckle Belly chain Bracelet Brooch Chatelaine Crown Cufflink Earring lapel pin Necklace Pendant Ring Tiara Tie clip Watch (pocket)

Making

People

Bench jeweler Goldsmith Jewelry designer Lapidary Watchmaker

Processes

Casting (centrifugal, lost-wax, vacuum) Enameling Engraving Filigree Metal clay Plating Polishing Repouss and chasing Soldering Stonesetting Wire wrapping

Tools

Draw plate File Hammer Mandrel Pliers

Materials

Precious metals

Gold Palladium Platinum Rhodium Silver

Precious metal alloys

Britannia silver Colored gold Crown gold Electrum Platinum sterling Shakudo Shibuichi Sterling silver Tumbaga

Base metals/alloys

Brass Bronze Copper Kuromido Pewter Stainless steel Titanium

Mineral gemstones

Aventurine Agate Alexandrite Amethyst Aquamarine Carnelian Citrine Diamond Emerald Garnet Jade Jasper Malachite Lapis lazuli Moonstone Obsidian Onyx Opal Peridot Quartz Ruby Sapphire Sodalite Sunstone Tanzanite Tiger's Eye Topaz Tourmaline

Organic gemstones

Amber Copal Coral Jet Pearl Abalone

Terms

Carat (unit) Carat (purity) Finding Millesimal fineness

Related topics: Body piercing Fashion Gemology Metalworking Wearable art

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