Gemstones that have fissures that touch the surface are often oiled emeralds are an example. Excess.Ī process used for enhancing a gemstone's colour and transparency. Niello paste is applied over incised gold or silver then fired in the enamellist's furnace. In Geneva, the first masterships date back to.Īn enamel-like alloy of lead, copper, silver, sulphur and sal ammoniac (ammonium chloride). In Switzerland, a master must take an exam and have several years' experience as a watchmaker-repairer. Its intensity depends on the refractive index of the stone and the quality of its polish. The effect produced by the reflection of light on the surface of a stone. In a lever escapement, the impulse occurs via the impulse surface of the wheel tooth and the pallet.Ī means of display in which the hour, shown through an aperture, instantly changes every 60 minutes.Ī raised mineral inclusion in a diamond found at the surface. Movement transmitted by a mechanical part. With its 365.25 days, the Julian year was 11 minutes.Īn opening in the case allowing easy access to one of the watch's internal components, usually the battery. The calendar now referred to by the majority of countries, introduced in 1582 by Pope Gregory XIII in his reform of the Julian calendar. The flirt is released every second and makes one complete revolution.
The emission of light by certain substances when subjected to an electric field.Ī small rod, driven by a separate train, whose end meshes with the escape-pinion's leaves. The price of a diamond is calculated according to the 4C criteria: Cut - Carat - Clarity - Color. He could be a jeweller, engraver, stonecutter, etc., provided he worked for a cabinet and was employed in.ĭiamond is the hardest and most luminous precious stone. A cabinotier was not necessarily a watchmaker. In Geneva, a workman employed by a cabinet.
The property of all stones, except those of the cubic crystal system (diamond, garnet and spinel), to divide a passing ray of light in two.
0 kommentar(er)
