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Two of the stones cut from the diamond were the 94.4-carat (18.88 g) Cullinan III, a clear pear-shaped stone, and a 63.6-carat (12.72 g) cushion-shaped stone. Queen Mary had these stones made into a brooch with the Cullinan III hanging from IV. Elizabeth II inherited the brooch in 1953 from her grandmother.
Princess cut diamond set in a ring. The princess cut (technical name 'square modified brilliant') is a diamond cut shape often used in engagement rings. The name dates back to the 1960s, while the princess cut as it exists was created by Betazel Ambar, Ygal Perlman, and Israel Itzkowitz in 1980.
Diamond proportions and facets, for the round brilliant cut. The modern round brilliant (Figure 1 and 2) consists of 58 facets (or 57 if the culet is excluded); 33 on the crown (the top half above the middle or girdle of the stone) and 25 on the pavilion (the lower half below the girdle). The girdle may be frosted, polished smooth, or faceted.
The sales of diamonds in the United States rose from $23 million to $2.1 billion between 1939 and 1979. [34] Law professor Margaret F. Brining links the surge in engagement ring sales in the USA after 1945 to the abolishment of the "breach of promise", that had entitled a woman whose fiancé had broken off their engagement to sue him for ...
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Just as the angle of the sides of a cabochon creates the pressure to hold the stone in place, so there is an overlying principle in setting faceted stones. If one looks at a side view of a round diamond, for example, one will see that there is an outer edge, called the girdle, and the top angles up from there, and the bottom angles down from ...
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