The halfpenny coin was the smallest denomination of the Irish pound which was decimalised on Decimal Day, February 15, 1971 it was one of three new designs introduced all in bronze. The coin suffered from the effects of inflation and very few were produced beyond the initial run for 1971. The coin was removed from […]

This article is a collection of concise Numismatic and coin collecting terms for the beginner or professional.

‘Numismatics (ancient Greek: ‘) is the scientific study of money and its history in all its varied forms. While numismatists are often characterized as studying coins, the discipline also includes the study of banknotes, stock certificates, medals, medallions, and […]

A merk was a Scottish silver coin. Originally the same word as a mark of silver, the merk was in circulation at the end of the 16th century and in the 17th century. It was originally valued at 13s 4d, later raised to 14s [1]. In addition to merks, half-merk and quarter-merk coins […]

The quincunx was an Ancient Roman bronze coin produced during the Roman Republic. The word quincunx comes from Latin “quinque” which means “five” and “uncia” which means “one twelfth”, because the coin was valued at five-twelfths of an as (a libra or 5 unciae). This value was sometimes symbolized by a patterns of five […]

Solidus can refer to:

Solidus (punctuation), the “/” or “⁄” punctuation character

solidus (chemistry), a concept in chemistry, materials science, and physics

solidus (coin), a coin used in Ancient Rome

Solidus Snake, a character in Metal Gear Solid 2: Sons of Liberty

Stamp Appraisals & Coin Appraisals Expert, international and often free stamp, coin and collections […]

Rockhounding is the recreational collecting of rocks and/or mineral specimens from their natural environment.

Early rockhounds were prospectors looking for valuable minerals and gemstones for commercial purposes. Eventually, however, more and more people have been drawn to rockhounding for recreational purposes, mainly for the beauty that rocks and minerals provide.

The rockhound’s principle piece of equipment […]

Coining can be:

Production of money — see mint (coin), money, or monetarism.

creation or definition of neologisms (new words or phrases)

A machining process — see coining (machining)

Counterfeiting of coins.

A massage therapy practiced in China and Southeast Asia, also known as “coin rubbing” - see Gua Sha.

An Australian drinking game with similar rules to pennying but using […]

The quadrigatus was a medium-sized silver coin produced by the Roman Republic during the 3rd century BC. The obverse featured a young janiform bust and the reverse featured Victory driving a quadriga, giving the coin its name, with the inscription “ROMA” below.

The coin weighed about 6.8 grams (6 scruples), consistent with a didrachma. The coin […]

Pool Safety Cameras are video monitoring systems ostensibly designed to reduce drowning deaths in public and private pools.

Aquatics video monitoring systems are broken into two categories:

Passive

Active

Passive systems are primarily a means of addressing the physical limitations of viewing blind spots in the swimming pool tank.
Active systems are designed to address the physical limitations […]

An Angel is a gold coin, first used in France (where it was also known as an Angelot and an Ange) in 1340, and introduced into England by Edward IV in 1465 as a new issue of the “noble” and so at first called the “angel-noble“. It varied in value between that period and the […]

Farthing is an old word meaning a fourth or a quarter. In modern usage it could refer to:

farthing, an old British coin valued one quarter of a penny

farthing, its counterpart among the predecimal coins of the Republic of Ireland

farthing, an old subdivision of the English county of Gloucestershire

Farthing, a subdivision of J. R. R. […]

Retention of Vision is a conjuring term referring to the perceived image of an object during a vanish (usually associated with vanishing coins). In a Retention of Vision vanish the spectator sees a coin placed on a palm and as the fingers are closed around the coin it is secretly removed, but, due to the […]

In mathematics, a semi-Hilbert space is a generalization of a Hilbert space in functional analysis, in which, roughly speaking, the inner product is required only to be positive semi-definite rather than positive definite, so that it gives rise to a seminorm rather than a vector space norm.

The quotient of this space by the kernel of […]

Sinus rhythm is a term used in medicine to describe the normal beating of the heart, as measured by an electrocardiogram (ECG). It has certain generic features that serve as hallmarks for comparison with normal ECGs.

ECG Structure
There are typically five distinct waves (identified by the letters P, Q, R, S, and T) in […]

The halfpenny coin was the smallest denomination of the Irish pound which was decimalised on Decimal Day, February 15, 1971 it was one of three new designs introduced all in bronze. The coin suffered from the effects of inflation and very few were produced beyond the initial run for 1971. The coin was removed from […]

An Airman’s coin is a challenge coin awarded to trainees and officer candidates in the United States Air Force once they have completed most of the requirements to graduate from their respective training programs (Basic Military Training, Air Force ROTC, or Officer Training School). The coin features on one side the image of an eagle […]

Half penny may mean:

British half penny coin (decimal)

British halfpenny coin (pre-decimal)

Irish halfpenny coin (pre-decimal)

Australian half penny coin (pre-decimal)

New Zealand half penny coin (pre-decimal)

See also

St. Patrick Halfpenny

Jill Halfpenny

British Coin Collecting, and all collecting accessories. - Specialist in the sale and purchase of British coins and most other world coins. I also have a range […]

The design of the Israeli 10 agorot coin was briefly a subject of controversy. In a press conference called by Palestine Liberation Organization chairman Yasser Arafat in Geneva, in December 13, 1988, he claimed that the obverse design of this coin incorporates a map of a “Greater Israel” that “goes from the Mediterranean to Mesopotamia, […]

An Arctic roll is a British dessert made of vanilla ice cream wrapped in a thin layer of sponge cake to form a roll, often with jam between the sponge and the ice cream. It was commonly served in school and as a typical summer pudding in the 1970s and ’80s. These days it is […]

Doubled die is a term in numismatics used to refer to doubling in the design elements of a coin. Doubled dies can appear as an outline of the design or in extreme cases, having legends and dates appear twice in an overlapping fashion.

Doubled die error coins can fetch significant prices when they are noticeable to […]

Zuz (coin) is an ancient Hebrew silver coin

ZUZ (Zentrale Unterstützungsgruppe Zoll) is the special operations group of the German customs service

CoinCollecting Made Easy : Coin Appraisals These coins are valued according to certain conditions. One way of finding out the value of your coins is to have a coin appraisal done by an expert in […]

Medallic orientation (or medal alignment or variations of these) is a feature of coins. When viewing one side of a coin with medallic orientation, correct side up, the coin must be flipped about its vertical axis in order to see the other side the correct way up. In other words, the image on one […]

Coins are made from one or more coinage metals.

Many coinage metals are from Group 11 of the Periodic table, but not all of them. Precious metals are used in bullion coins and some collectable coins.

External links

List of metals and their alloys which have been used in coins

COIN-OR A repository of source code, models, data […]

Koban can refer to two different Japanese words, with different pronunciations:

kōban (交番), with a long o: Koban (police box)

Koban (小判), with a short o: Koban, a former Japanese oval gold coin

It is also the name of the ancient Koban culture in Ossetia.

Superior Galleries | Elite Rare Coin Auctions, Appraisals, Buy While […]

50 cents may refer to 50 subunits of currencies where the subunit is called a cent. Note that some of these currencies may not be dollars; see cent (currency) for complete listing. Normally 1 main unit is divided into 100 cents, making ½ main unit equal to 50 cents. But most of the time, coins […]