("Emerald cut")
Cut in the plane of the girdle has a shape of rectangle with chamfered corners, cut – speed. Faceted stone in the classic version has 65 facets and consists of a platform surrounded by 3 tiers trapezoid crown facets (8 facets in the tier) and the 4 tiers trapezoid pavilion facets (8 facets in the tier). In the old cuts there is a line caletta.

The basic elements of the step-cut "Emerald"
(measurements optimal cut shapes)

The calculation of the weight

Calculate the weight (in carats) of the standard diamond-cut "Emerald" produced by the basic formula:

M = L x B x H x k

where M – mass cut diamond, L is the length of the cut of a diamond, the width of the diamond, H be the height of the diamond, k – conversion factor metric measurements using the volume to mass, taking into account the geometry of the cut, and the density of diamond having a value 0,0092. Calculation of the weight of the diamond-cut "emerald Isometric" is made on the basic formula with a coefficient value k – 0,0080.

More precisely, a weight is determined taking into account the amendments on the thickness of the girdle, bulge cut, size caletta, the ratio of the proportions of the cut.

Cut the shape "Emerald cut" is widely applied to colored stones from the XIII century, and diamonds were used from the mid-fifteenth century as a kind of baguette-cut is not always sustained symmetry in the arrangement of the chamfers at the corners. Classic emerald cut received clearance in the early twentieth century and initially found wide application in jewelry firm Cartier (Cartier) in 1912, designed in the style of "art Deco".