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1. A unit investment trust in which the underlying asset is the Dow Jones Industrial Average. That is, diamonds are shares in a closed-end index fund tracking the DJIA. It is traded on the American Stock Exchange. It operates much like an exchange-traded fund, but, like all unit investment trusts, it has an expiration date, while ETFs do not. Its ticker symbol is DIA.

2. A valuable commodity consisting of very hard gem stones used in jewelry and tools. Diamonds may be traded on any of a number of exchanges. See also: Blood diamonds.


Registered name for interest in a trust that holds all 30 stocks included in the Dow Jones Industrial Average. Ownership of a Diamond allows an investor to track the DJIA with a single investment. Diamonds are traded on the American Stock Exchange under the symbol DIA.
References in periodicals archive ?
Before building an open pit in such an extreme and remote area, there are many variables to consider including the amount of overburden on top of the kimberlite, near-surface ground water and other environmental considerations such as the development's proximity to water bodies and sensitive areas, as well as the distance from a mill.
Had the Beni Bousera made it up faster, some of its layers might have been a staggering 15 percent diamond, or 10,000 times as rich as kimberlite.
The area was identified on the basis of historic sampling, by the Saskatchewan Geological Survey and the Geological Survey of Canada in the early 1990's that recovered high counts of kimberlite indicator minerals including significant concentrations of pyrope and eclogitic garnets, chrome diopside and oxides covering a large aerial extent of unglaciated terrain.
The OGS indicates a significant number of kimberlite clusters are thought to have the potential of hosting diamonds.
Studies have concluded that this cluster of diamond-bearing kimberlite pipes range from 3 to 250 ha in surface area and from 3 to 675 million tonnes in mass.
The job is to find more kimberlite through critical mass to make the low-grade diamonds economical or alternatively, find something slightly better than Pipe 95-2.
Stornoway has been involved in the discovery of 61 kimberlites since 2002, more than a third of which have proven diamondiferous.
Since the original discovery of kimberlite 95-2, Contact Diamond has discovered eight kimberlites, (including SC-118 in Quebec) six of which are diamondiferous (contain diamonds).
The company is planning a follow-up program of prospecting and sampling to assess these new targets as well as to collect larger samples of some of the known kimberlites in order to better evaluate their diamond potential.
The 23-hectare pipe has chemistry similar to other known diamond pipes in Ontario, such as the DeBeer's Victor kimberlite and Contact Diamond Corporation's 95-2, according to Duffett.
Geological logging of the drill core indicates that the Brauna 3 pipe is a macrocrystic micaceous hypabyssal kimberlite.
The Spider-KWG find increases the total number of announced kimberlites in the Attawapiskat cluster to 21.