BismuthBismuth is a chemical element with the symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs naturally, and its sulfide and oxide forms are important commercial ores. The free element is 86% as dense as lead. It is a brittle metal with a silvery-white color when freshly produced. Surface oxidation generally gives samples of the metal a somewhat rosy cast.
ReliquaryA reliquary (also referred to as a shrine, by the French term châsse, and historically including phylacteries) is a container for relics. A portable reliquary may be called a fereter, and a chapel in which it is housed a feretory. Relics may be the purported or actual physical remains of saints, such as bones, pieces of clothing, or some object associated with saints or other religious figures. The authenticity of any given relic is often a matter of debate; for that reason, some churches require documentation of the relic's provenance.
Thermal expansionThermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, molecules begin to vibrate and move more, usually creating more distance between themselves. Substances which contract with increasing temperature are unusual, and only occur within limited temperature ranges (see examples below).
Limoges enamelLimoges enamel has been produced at Limoges, in south-western France, over several centuries up to the present. There are two periods when it was of European importance. From the 12th century to 1370 there was a large industry producing metal objects decorated in enamel using the champlevé technique, of which most of the survivals (estimated at around 7,500 pieces), and probably most of the original production, are religious objects such as reliquaries.
GoldsmithA goldsmith is a metalworker who specializes in working with gold and other precious metals. Nowadays they mainly specialize in jewelry-making but historically, goldsmiths have also made silverware, platters, goblets, decorative and serviceable utensils, and ceremonial or religious items. Goldsmiths must be skilled in forming metal through , soldering, sawing, forging, casting, and polishing. The trade has very often included jewelry-making skills, as well as the very similar skills of the silversmith.
Enamelled glassEnamelled glass or painted glass is glass which has been decorated with vitreous enamel (powdered glass, usually mixed with a binder) and then fired to fuse the glasses. It can produce brilliant and long-lasting colours, and be translucent or opaque. Unlike most methods of decorating glass, it allows painting using several colours, and along with glass engraving, has historically been the main technique used to create the full range of image types on glass.
Ornament (art)In architecture and decorative art, ornament is decoration used to embellish parts of a building or object. Large figurative elements such as monumental sculpture and their equivalents in decorative art are excluded from the term; most ornaments do not include human figures, and if present they are small compared to the overall scale. Architectural ornament can be carved from stone, wood or precious metals, formed with plaster or clay, or painted or impressed onto a surface as applied ornament; in other applied arts the main material of the object, or a different one such as paint or vitreous enamel may be used.
Fibula (brooch)A fibula (/ˈfɪbjʊlə/, plural fibulae /ˈfɪbjʊli/) is a brooch or pin for fastening garments, typically at the right shoulder. The fibula developed in a variety of shapes, but all were based on the safety-pin principle. Unlike most modern brooches, fibulae were not only decorative; they originally served a practical function: to fasten clothing for both sexes, such as dresses and cloaks. In English, "fibula" is not a word used for modern jewellery, but by archaeologists, who also use "brooch", especially for types other than the ancient "safety pin" types, and for types from the British Isles.
Glass artGlass art refers to individual works of art that are substantially or wholly made of glass. It ranges in size from monumental works and installation pieces to wall hangings and windows, to works of art made in studios and factories, including glass jewelry and tableware. As a decorative and functional medium, glass was extensively developed in Egypt and Assyria. Glassblowing was perhaps invented in the 1st century BC, and featured heavily in Roman glass, which was highly developed with forms such as the cage cup for a luxury market.
BroochA brooch (ˈbroʊtʃ, also USˈbruːtʃ) is a decorative jewelry item designed to be attached to garments, often to fasten them together. It is usually made of metal, often silver or gold or some other material. Brooches are frequently decorated with enamel or with gemstones and may be solely for ornament or serve a practical function as a clothes fastener. The earliest known brooches are from the Bronze Age. As fashions in brooches changed rather quickly, they are important chronological indicators.
