This section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreA comparison study was made between the yellow and white nacre of the gold-lipped Pinctada maxima oyster shell and 65 yellow cultured pearls.
Read MoreFarmers have experimented with bead nucleation, but until recently the methods tried did not produce the quantity or quality necessary for economic success.
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The fascinating and colourful history of natural pearling in Australian waters.
Read MoreBlack pearls have been found in Mexico’s Gulf of California since the area was settled more than 2,000 years ago.
Read MoreThe successful culturing of abalone pearls has been known since French scientist Louis Boutan’s experimentation in the late 1890s, but commercial production has only been achieved in recent decades.
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Treated cultured pearls with a “chocolate” colouration have entered the market from several sources.
Read MoreHistorically, natural black pearls have been one of the rarest and most exotic of gem materials.
Read MoreThe American freshwater pearl industry and its new entry, the freshwater cultured pearl.
Read MoreThis article describes the method of culturing these "pearls" as well as the differences between this material and 3/4 South Sea cultured pearls or assembled cultured blister pearls (Mabe pearls).
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