BPP	Best Practice Principles – The term used for a suite of criteria DTC have compiled to ensure consumers buying diamond jewellery will be able to rely with confidence on the ethical standards of the industry. As part of this initiative, clients are required to undergo third party reviews to ensure that they are in compliance with the BPP criteria.
Carat	Measure of weight typically used with reference to diamonds.  One carat is equal to 0.20 grams.
Conflict Diamonds	A conflict diamond (also called a blood diamond) is a diamond mined in a war zone and sold, usually clandestinely, in order to finance an insurgent or invading army's war efforts.
Contract Period	Under Supplier of Choice, clients enter into a two-year supply contract with the DTC.  At the end of each period, the list of Sightholders reviewed and companies from outside the Sightholder group can apply for Sightholder status
DBGM	De Beers Group Marketing Responsible for the marketing initiatives of De Beers, including Forevermark.
Diamond Pipeline	The route the diamond takes from mine to end consumer.  This includes, sorting, selling as rough, polishing, setting in jewellery, wholesale and retail sale.
Downstream	Refers to that area of the pipeline closer to the consumer level.
DTC	Diamond Trading Company.  Distribution arm of the De Beers Group of Companies.
Forevermark	Each diamond that carries the Forevermark promise is inscribed with a special symbol and unique identification number. This means that the diamond has been specially selected and cared for at every step of its journey from deep within the earth to the consumer.
Rough Diamonds	Diamonds as found in their natural state, prior to any polishing work being conducted.
Sightholder	Companies selected as eligible to purchase diamonds from the Diamond Trading Company under its supply and distribution arrangements known as Supplier of Choice. Ten times a year, Sightholders are invited to London to view rough diamonds that are being offered to them for sale.  There are currently 84 companies on the list of Sightholders and competition is fierce amongst the group for the limited diamond supply.
Sightholder Profile	The document clients submit to the DTC on an annual basis by which they are assessed and ranked.  The profile enables the DTC to gauge Sightholders’ performance in the criteria considered important to successful diamond trading.
Supplier of Choice	The Diamond Trading Company’s sales and marketing strategy, which aims to drive consumer demand for diamond jewellery.
Synthetic Diamonds	A synthetic is any object or product that has been either partially or wholly crystallised or re-crystallised due to artificial human intervention such that, with the exception of being non-natural, the product meets the requirements specified in the definition of the word ‘Diamond’ as above.