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GIA Diamonds And Diamond Grading
Exam 2024/2025 Guaranteed Pass
(Answered)
An appraisal is an estimation of value of an article. And jewelry appraisals are commonly used to identify jewelry items, and establish values for insurance replacement. The Argyle Mine in Australia, contributed to: The rise of cutting industry in India The dramatic growth of India's dive, and cutting industry, was a direct result of the high-level of production from the Argyle mine in Australia Wholesale price lists are usually organized according to: Specific combinations of the four Cs The wholesale prices on publish price list are usually based on specific combination of the four Cs The Diamond industry has has changed, dramatically and recent years because:
The world supply of diamond rough has increased, making diamonds available to a wider consumer base Diamond supreme, hardness, and durability are: A result of the conditions on which it formed Formation under specific temperature, temperature and pressure conditions result in diamonds, supreme, harness, durability, and desirable optical properties. Diamond prices on wholesale price lists: Depends on the market conditions that exist when the list are published. Published wholesale price list are based on specific combination of the four Cs and depend on the market conditions that exist when they are published Substantial price discounts are available to retailers and Jewelry manufactures who: Can buy in large quantities. Wholesalers usually sell goods in large quantities and their customers who buy large quantities often get substantial discounts
Before the discovery of South Africa is diamond deposit, the worlds two major producers were India, and: Brazil India was the world's major source of diamonds until Brazil became an important source in the 1700s. Who established de beers consolidated mines limited in 1888? Cecil Rhodes A soft diamond berry material near the surface of a diamond field was named: Yellow ground The soft, workable diamond, bearing material near the service of a mining claim, was called yellow ground. The harder material beneath the surface was called blue ground. The south African diamond rush was sparked: The discovery of the star of South Africa.
The discovery of the star of South Africa, 1869, and the publicity that surrounded it, initiated the diamond Russian in South Africa. Cecil Rhodes main competitor in his early attempts to control Diamond production was: Barney Barnato Barney Barnato was an entrepreneur who completed with Cecil Rhodes for ownership of shares of the Kimberley mine Oppenheimer's answered to low diamond demand in the 1930s was to: Shut down operations of the deBeers Mines Ernest Oppenheimer shut down the operation of the deBeers mines in 1932, because of low demand for diamonds during the great depression Large high-quality diamonds are: Graded much more thoroughly than small, low quality ones. The most consistent and dependable sources of diamond grades are: Reputable, gemological, laboratories
1860s The Eureka and the start of South Africa were found in the 1860s in South Africa DeBeers requires its site holders to have an excellent reputation in the industry and: The financial strength to make a large purchase commitments Site holders have to be financially strong enough to make large purchases, and have reliable distribution outlets for their polished goods. The group that united in 1890 to buy and sell the output of major Diamond producers, including debeers, was the: London diamond syndicate A group of prominent diamond merchants formed the London diamond syndicate, and contracted to buy all the output of the major diamond producers, including de beers Site holders purchased diamond rough by: Attending invitation, only trading events Selected clients called sight holders are invited to trading events called sites that were held approximately 10 times a year in London. Smaller sights take place in Lucerne and Johannesburg.
DeBeers consolidated mines limited, was named for: The owners of a farm, where one of the first diamond rushes took place Rhodes named his company after the owners of the farm or one of the first diamond rushes took place In the diamond trade, the word "specials" refers to: Diamond rough over 10.8 carats Rough diamonds over 10.8 carats are called specials and are not included in site boxes. Instead they are sold individually. The central selling organization was a: Rough Diamond distribution agency The CSO served as the rough diamond distribution agency for de beers until 2001 The diamond information center and the Diamond promotion service were created to: Assist in Diamond marketing efforts
A program adopted by deBeers in 2007 to answer critics and resolve. Shortcomings of its SOC program is called.: Supplier of choice 2 Deb's adopted a program called supplier of choice or SOC in 2001. It was not wholeheartedly welcomed by the industry. In an effort to resolve shortcomings of the SOC deBeers enacted supplier of choice two and 2007. In South Africa, a new mining charter that designates the people of the country as the owners of the mineral resources is a result of: Black economic empowerment One result of black economic empowerment is a new mining charter that does designates the people the country as the rightful owners of its mineral resources with the government as custodian A city region or country with a large number of gemstone manufacturer is called: A cutting center A cutting center is a city region with a large number of gemstone manufacturing businesses By 2004 more than 90% of the manufacturing for the Diamond market was done:
In India By 2004 more than 90% of the manufacturing for the diamond market was done in India employing over 1 million workers The involvement of a business or industry, and all aspects of its products market is called: Vertical integration A chief characteristic of the Russian diamond industry was its vertical integration, which meant they were involved in mining sorting, cutting jewelry manufacturing, distribution, marketing, and sales of the diamonds. Vas quantities of small inexpensive diamonds, suitable for low-cost mass market Jewelry are mined in: Australia Australia's Argyle Mine produces large quantities of diamonds that are mostly small and difficult to cut. They are processed by India's vast cutting industry. The diamond industry program designed to ensure that diamonds do not find civil conflict or terrorism is called: The Kimberly process
A Bourse a(an): A diamond buying and selling club A Bourse is a place where Diamond professionals can meet to make deals in a secure environment The beer became a privately owned company in: May 2001 Despite some controversy, Nicholas Oppenheimer, headed to concert that bought all outstanding shares and took de beers private in May 2001 Diamonds were delivered to the Earth surface as recently as: 20 million years ago The first diamond bearing and placement probably occurred more than 2.5 billion years ago, and the most recent was probably around 20 million years ago The first authenticated diamond discovered in South Africa is named the; Eureka
When Erasmus Jacobs found a pretty pebble and gave it to his sister, to play with, he'd actually found the diamond that would be named the Eureka. Diamond is hard, and graphite is soft because of the difference in: The way they Atoms fit together Diamonds atoms are arranged and tight, three-dimensional patterns, bonded, more strongly than graphite atoms Scientist have found the diamonds form and 2 types of rocks, called: peridotite and eclogite Diamonds form in peridotite and eclogite, but are delivered to the earths surface by Kimberlite and lamproite How far beneath the Earth surface do diamonds form? 90 to 140 miles (140 to 220 km) The temperature and pressure conditions necessary for Diamond to form exist in very limited areas of the earths upper mantle
Subduction occurs when: Two of the earths crustal plates collide Subduction occurs when two of the earths crustal plates collide, and one is forced under the other, causing it to melt Most of the worlds, Kimberlite pipes: Do not contain diamonds in profitable quantities Only a small number of known Kimberlite pipes contain enough diamonds to be profitable to mine Diamond and graphite are both made of: Carbon The chemical composition of diamond and graphite is the same, but their properties are very different Before arriving at the earths surface, diamonds might meringue and the mantle for as long as a few:
Hundred million years If conditions are favorable, diamonds might remain in the mantle for hundreds of millions of years before they are carried to the earths surface The proper environment for diamond formation includes the right temperature, pressure, and: The availability of carbon Carbon must be present in order for a diamond to form The deep vertical formations, through which diamonds travel to the surface are called: Pipes Pipes form as the result of a kimberlite or lamproite emplacement Diamonds are more concentrated in: Marine deposits Both alluvial, and Marine deposits are richer and diamonds, then primary deposits because the host rock is washed away by the action of the moving water
By the 1990s pipe mines had become the worlds major source of diamonds, although alluvial deposits, remain important, because they are higher proportion of Gem quality diamonds For more than 2000 years, the only known Diamond sources were: Alluvial Pass some present stream beds were the earliest sources of diamonds Diamond classified as Cable can be 100 times more valuable than: Industrial diamonds Cable diamonds have good enough size shape, clarity, and color to be fashioned into Gems To focus the research for Diamond deposits, geologists look for: Indicator Minerals Because certain minerals are usually present around deposits that can provide useful information, mineral sampling, is one of the most important steps in the search for diamonds
The concentration of diamonds within a pipe is called: Ore grade Ore grade is usually reported as a number of carrots of diamond for 100 tons of the surrounding material Mines potential profitability depends on part on: It's ore grade The concentration of diamonds within a pipe can determine whether a deposit will be profitable to mine Gravity sorting separates diamonds from: Lighter materials Gravity sorting involves separating the lighter materials out of the test samples until only the diamonds are left A profitable mine: Produces diamonds, whose value is higher than the mines operating costs
