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The beads again are rolled in hot sand to remove flashing and soften seam lines. By making canes (the glass rods fed into the machine) striped or otherwise patterned, the resulting beads can be more elaborately colored than seed beads. One "feed" of a hot rod might result in 10–20 beads, and a single operator can make thousands in a day.
Pearls are irradiated to produce gray blue or gray-to-black colors. [24] Methods of using a cobalt-60 gamma ray facility to darken white Akoya pearls were patented in the early-1960s. [31] But the gamma ray treatment does not alter the color of the pearl's nacre, therefore is not effective if the pearl has a thick or non-transparent nacre. [31]
Luster or lustre - a transparent "pearl" effect applied to the surface of the seed bead; AB or aurora borealis - a rainbow effect applied to the surface of a seed bead; Formulas for different colors of glass are closely guarded. The recipe for a true black glass was lost during World War I, [6] and modern black glass held to sunlight is a deep ...
Assorted keshi pearls. Keshi pearls are small non-nucleated pearls typically formed as by-products of pearl cultivation. A Japanese word also meaning "poppy" (ケシ, 芥子), it is used in Japanese for all pearls that grew without a nucleus. Originally, keshi pearls referred to those pearls formed when a bead nucleus was rejected.
The correct definition of a South Sea pearl – as described by CIBJO and GIA – is a pearl produced by the Pinctada maxima [21] pearl oyster. South Sea pearls are the color of their host Pinctada maxima oyster – and can be white, silver, pink, gold, cream, and any combination of these basic colors, including overtones of the various colors ...
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A selection of glass beads Merovingian bead Trade beads, 18th century Trade beads, 18th century. A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing.
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