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Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
Examples of jewelry worn by the higher social classes include solid gold necklaces, earrings, bracelets, rings, and bulla with many variations within these classes of jewelry. Some bracelets were used without clasps (solid gold snake bracelets), while others used gold pins or small gold screws to fasten the bracelet to the wrist.
By 1500 BC, the peoples of the Indus Valley were creating gold earrings and necklaces, bead necklaces, and metallic bangles. [citation needed] Before 2100 BC, prior to the period when metals were widely used, the largest jewellery trade in the Indus Valley region was the bead trade. Beads in the Indus Valley were made using simple techniques.
The jewelry of the Byzantine Empire often features religious images or motifs such as the cross, even in pieces that were for secular use. Elaborate Roman styles were continued, but with growing use of cloisonné enamel. The main commissions for gold work and jewelry came from the Court or the Church. [18]
Magnetic earrings – Magnetic earrings simulate the look of a (pierced) stud earring by attaching to the earlobe with a magnetic back that hold the earring in place on by magnetic force. Stick-on earrings – Stick-on earrings are adhesive-backed items which stick to the skin of the earlobe and simulate the look of a (pierced) stud earring.
Today, momme weight is still the standard unit of measure used by most pearl dealers to communicate with pearl producers and wholesalers. One momme corresponds to 1/1000 kan. Reluctant to give up tradition, the Japanese government formalized the kan measure in 1891 as being exactly 3.75 kilograms or 8.28 pounds.