Victorian Agate Pietra Dura Locket

• 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.
• Victorian Period - The Victorian period of furniture and decorative arts design covers the reign of Queen Victoria from 1837 to 1901. There was not one dominant style of furniture in the Victorian period. Designers used and modified many historical styles such as Gothic, Tudor, Elizabethan, English Rococo, Neoclassical and others, although use of some styles, such as English Rococo and Gothic tended to dominate the furniture manufacture of the period.
  
  The Victorian period was preceded by the Regency and William IV periods, and followed by the Edwardian period, named for Edward VII (1841 ? 1910) who was King of the United Kingdom and the British Dominions and Emperor of India for the brief period from 1901 until his death in 1910.
• Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.
  
  For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.
  
  It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.
  
  In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.
• Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.

This item has been included into following indexes:

• pendants and lockets, gold - gold, other 3,245
• pendants and lockets, set with - pietra dura 15
• pietra dura - jewellery 73