Goddess Ra, Burma, circa 18th Century, gilt on bronze, exquisite detail, fine workmanship, mounted on non-original wooden base, classic Burmese design of Ra the Archer, possibly Mandalay area.
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[Circa 1910 gold, natural pearl and synthetic ruby ring]
Why make synthetics?
Circa 15,000 BC, early rock carvings called petroglyphs depicted signs and symbols scratched into rock in an attempt to communicate and record events.
CIRCA Approximately. Used as a description for approximate date of manufacture. An antique item may be described as Circa 1920 to describe its age or the approximate period which it's design would be associated with.
Neolithic - Circa 4500 to 2300 BC
They have been enchanting people from the first time Neolithic man selected an unusual piece of bone, shell, stone, wood or a fashioned piece of clay and placed it on a leather thong.
Egyptian Revival Jewelry: Articles of jewelry made circa 1860-70, copying the overall appearance and style of classical Egyptian jewelry, but made without using the actual ancient Egyptian techniques.
The main adit at the Tourmaline Queen mine, circa 1972.
A successful mineral collector knows one secret... there is always something more to be found in every locality.
According to the traditional history of western alchemy, metallic antimony was described (previous to Biringuccio) by the putative Prior Basilius Valentinus in a Latin manuscript, Currus Triumphalis Antimonii, supposedly circa 1450.
The carving of gems became an important art in ancient times with the introduction (circa 3500 BC) of seal stone engraving by the Babylonians.
Cultured Pearl: A means of duplicating the organic process of natural pearl creation invented by Kokichi Mikimoto circa 1893.
A means of duplicating the organic process of natural pearl creation invented by Kokichi Mikimoto circa 1893.
Highly prized during the Ottoman Empire (circa 1300), the Turkish Sultans amassed the world's largest collection of Peridots.
A gold simulant, invented circa 1720 by Christopher Pinchbeck, which is comprised of a mixture of copper and zinc
Piqué
Tortoiseshell or horn which is inlaid with mother-of-pearl, silver or gold ...
The elusive process of circa dating a piece can now be unlocked by just knowing how to use the keys to the door. Jewelry styles change with the trends of the times. These trends can be grouped into approximate eras.
The history of adornment can be traced back to the Minoan period in Greece (circa 2500 BC), where amethyst has been found as polished cabochons set into gold rings. Popular in the 19th century, amethyst was a favorite gem in art nouveau jewelry.
It helps readers to find out circa date for their pieces, authenticate and identify metals, and determine the value of treasured items made from 1840 to 1950. It also gives answers to questions about jewelry manufacturing and construction techniques.
Engraved Casebacks - Again, with the exception of a rare Ladies model (circa 1990's) and the "Sea-Dweller" model, Rolex does not engrave any logos or slogans on their casebacks. Moreover, they are free of any engravings.
Art Nouveau is a decorative style (circa 1890-1914) noted for its free-flowing lines and natural motifs.
asterism ...
Pinchbeck
A gold simulant, invented circa 1720 by Christopher Pinchbeck, which is comprised of a mixture of copper and zinc ...
Art Nouveau - Art Nouveau is a decorative style (circa 1890-1914) noted for its free-flowing lines and natural motifs.
Diggings in the Middle East have uncovered limestone shekel-weights dating back to King Solomon (circa 1,000 BC) with their weight denomination engraved.
Half-Pearls: Parts of pearls and seed pearls that were popular in making designs of flowers and scrolls starting about 1890, sometimes mingled with coloured gemstones. Popular for many decades and not always an aid for circa dating.
Therefore, the pale stones are treated with circa at 700 degree Celsius to achieve the desired bright colour. Difference between original and enhanced stone could be distinguished in incandescent light.
Although it has a dirty grey colour in the rough, cut stones aquire a metallic lustre and a beautiful sheen at the right angle. The stones are usually cut with a flat surface and have been carved as cameos. The original source circa 1770 was the ...
Usually in pressed patterns, it was mostly manufactured by Northwood Glass Co., (Ohio); Imperial Glass Company (Ohio); and the Fenton Art Glass Company (West Virginia). Carnival glass was utilized as ornamental beads for hatpins, circa 1930-1940.
from a smaller stone which is usually separated by a bow or other motif Pietra Dura Mosaic of semi-precious stones set into a floral pattern of black marble or onyx, also known as a hardstone mosaic Pinchbeck A gold simulant, invented circa ...
 See also: Antique, Jewel, Jewelry, Color, Gold
  
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