What is the abbreviation for Carat in jewellery?
The carat, sometimes known as a ‘metric-carat’, is the standard unit of weight for polished gems, as well as rough diamonds. One carat – international abbreviation ‘CT’ – is the equivalent of 200 mg, i.e. a fifth of a gram. This unit was officially introduced in Portugal in 1911 as a standard measure, approved and defined by the Comité International de Poids et Mesures at its General Conference in Paris in 1907.
Can a Chronograph be a Chronometer?
A chronograph is a watch with a stopwatch function that features totalizers and additional hands. A chronometer is a watch with a mechanism that has received a certificate after passing a number of precision tests administered by the Contrôle Officiel Suisse des Chronomètres (COSC); it can be a simple watch (hours, minutes, seconds) or a chronograph.
What is a Calibre?
This is a technical term that describes the shape, size or specifications of a watch mechanism. The calibre can be wound manually or automatically, and comes in different shapes and sizes. Previously, the diameter of a calibre was measured in lignes, with a ligne equivalent to 2.256 mm.
What should we consider when it comes to a watch’s Crown?
It is the main button, generally located on the right-hand side of a watch case. It is used to wind the watch, set the hands and the date (by pulling the crown out). Many watches have a threaded system for the crown to ensure the case is tightly sealed, where it is necessary to unscrew it before using. Crowns normally carry an embossed brand logo and if they are decorated with (precious or semi-precious) stones, they are called a cabochon.
What is Sapphire Crystal?
The transparent cover of a watch case is sometimes called “crystal”. The crystal protects the display on the watch front, but can also be used on the back as a transparent background, which allows the wearer to see the intricate details of the watch’s mechanism, giving the impression that it is “open”. Most luxury brands use sapphire crystal, which has a hardness of 400, compared to 50 of window glass and 100 of quartz. Sapphire crystal is an extremely hard and scratch-resistant synthetic glass for watches. It is super transparent and offer excellent visibility.
As it appears on the crown of a watch, is a Cabochon a stone?
In Portuguese, the word cabução does not correspond to a stone, but rather a style of cutting where the stone is polished with a concave surface, with various contours (e.g. round, oval, pear-shaped, heart-shaped). In watchmaking, the cabochon encrusted on crowns are usually rounded sapphires.
Is there a Coloured stone for every academic degree?
In terms of different faculties and their various courses, there are certain colours, rather than specific stones, which are traditionally used. For example, for law, the colour is red; for literature, it is dark blue; for sciences, it is light blue; for pharmacy it is purple and for medicine it is yellow. The choice of gems of the same colour is therefore a question of the graduate’s taste and budget, with options that vary from synthetic stones to natural gems.