Antique pietra dura pendant and pique tortoise shell brooch, width 22 & 27 mm, both with losses
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- Pique Work - A decorative technique used on jewellery and small decorative objects in which designs are created by inlaying small gold or silver studs and stips into tortoiseshell. The art reached its highest point in 17th- and 18th-century France, particularly for the decoration of small tortoiseshell articles such as combs, patch boxes, and snuffboxes.
- Tortoiseshell - Tortoiseshell is a translucent material that comes from the horny carapace of a certain types of turtles, including the hawksbill turtle. It is often therefore mounted on a colour underground - often red - or inlaid with gold or silver thread, as seen in Boulle furniture.
The texture and colour nuances of the material are extremely important. Heated tortoiseshell can easily be formed into various shapes. Like other natural materials, tortoiseshell becomes more beautiful with use. In a time before plastic, tortoiseshell was widely used for small objects such as combs and powder compacts.
In 1973, the trade of tortoiseshell worldwide was banned under CITES (The Convention on International Trade in Endangered Species). Prior to importing or exporting items containing tortoiseshell a CITES permit must be obtained. Tortoiseshell items cannot be traded on Ebay.
"Faux tortoiseshell", another case of man initiating nature, is made from old-style plastics such as celluloid and cellulos and is coloured with red, yellow and brown spots to imitate the genuine article. It is commonly used in glasses frames, musical instruments and costume jewellery.
- Pietra Dura / Florentine Mosaic - Pietre dura, also known in English as "Florentine mosaic" is a decorative art that originated in Renaissance Italy and involves the creation of intricate, multi-layered inlaid designs using a variety of different coloured stones. The name "pietre dura" is Italian for "hard stones," and refers to the use of hard, durable materials such as marble, agate, jasper, and other semiprecious stones in the creation of the designs.
The origin of pietre dura can be traced back to ancient Rome, where the technique was used to create intricate inlaid designs for mosaic floors, walls, and other architectural elements. During the Renaissance, the technique was revitalized in Italy and became particularly associated with the city of Florence. The court of the Grand Duke of Tuscany, Cosimo I de' Medici, was a major patron of pietre dura and employed many of the leading artists and craftsmen of the time to create a wide range of objects, from small items like jewelry boxes and vases to large panels and furniture.
In the 19th century, pietre dura was used to create a wide range of decorative objects, from furniture and decorative panels to small items like jewelry boxes, vases, and picture frames. During this time, the technique was particularly popular in Europe, where it was used to create elaborate pieces of furniture and other decorative objects for the wealthy and aristocratic classes.
In addition to traditional pietre dura objects like cabinets, tables, and vases, the 19th century saw the development of new forms of pietre dura, such as book covers, cigar boxes, and other small items. This was largely due to the advent of new, more affordable production techniques and materials, which allowed for the creation of pietre dura objects on a larger scale and at a lower cost.
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