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Paysanne; 1 ⁄ 2 by 1 ⁄ 2 by 1 ⁄ 8 inch (10 mm × 10 mm × 3 mm) Lozenge; diamond shape, 1 ⁄ 2 by 1 ⁄ 2 by 1 ⁄ 8 inch (10 mm × 10 mm × 3 mm) Fermière; cut lengthwise and then sliced to desired thickness 1 ⁄ 8 – 1 ⁄ 2 inch (3–10 mm) Rondelle; cylindrical vegetables cut to discs of desired thickness 1 ⁄ 8 – 1 ⁄ 2 inch ...
The main stone, named the Graff Lesedi La Rona, is the world's largest emerald-cut diamond. It is a D-color (totally colorless), high-clarity stone weighing 302.37 carats (60.474 g; 2.1332 oz). According to Graff, the stone is the "largest highest clarity, highest color diamond ever graded by the Gemological Institute of America (GIA)". The ...
The picometre (SI symbol: pm) is a unit of length in the metric system equal to 10 −12 metres ( 1 / 1 000 000 000 000 m = 0. 000 000 000 001 m). To help compare different orders of magnitude this section lists lengths between 10 −12 and 10 −11 m (1 pm and 10 pm). 1 pm – distance between atomic nuclei in a white dwarf [citation ...
Instead of a culet, step-cut stones have a keel running the length of the pavilion terminus. Like other fancy shaped diamonds, emerald cut diamonds can come in a variety of length to width ratios. The most popular and classic outline of emerald cut diamonds are close a value of 1.5. The Asscher cut, a square modified emerald cut, is also popular.
The diamond cut planning stage is a complex process that requires the cutter to work with unique rough stones. Very often, the location of the inclusions in a rough stone will determine the type of shape to which a diamond may be cut. For economic reasons, most diamonds are cut to retain weight instead of maximizing brilliance. [2]
An example of this is the marquise cut diamond which was popular in the 1970s to 1980s. In later decades, jewelers had little success in selling this shape in comparison to other shapes like the oval or pear shape. [citation needed] The marquise can be cut into an oval diamond by any diamond cutter with a loss of 5 to 10% in total weight.
Emerald Origin Date Uncut size Cut size Location Ref Chipembele emerald Zambia 2021 7,525 carats (1,505.0 g) Israel Diamond Exchange, Eshed – Gemstar [14] [15] [16] Inkalamu emerald Zambia 2018 5,655 carats (1,131.0 g) Private Collector [17] Insofu emerald Zambia 2010 6,255 carats (1,251.0 g) Jewellery brand [18] Bahia Emerald: Brazil 2001
Patented design of top faceting of the trillion cut diamond (Patent No. D-250,100) A trilliant cut, sometimes called a trillion, trillian, or Trielle is a triangular type of gemstone cut. The cut has many variations. It may have curved or uncurved sides. The shape of the top surface, or table, also varies. Stones typically have 31-50 facets. [1]