Nature gives us a brilliant palette of colour-changing leaves and a spectacular kaleidoscope of colourful sunsets during the autumn season.
Read MoreThe fashion trend of colorblocking can be found in the artistic combinations of color in multicolor gemstones known for their color zoning or banding.
Read MorePresents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
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Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.
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Discusses the mineralogical composition and provenance of this spotted decorative gemstone.
Read MoreExamines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.
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This type of pink pyrope garnet, believed to have been mined in Tanzania, shows a distinct colour-change phenomenon resulting from its unique chemical composition.
Read MoreSuggested Reading on Sapphires and their Inclusions
Read MoreEvaluates the usefulness of Raman spectroscopy in distinguishing the colour varieties of nephrite based on the relative ratio of Mg to Fe concentration.
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Examines the sources, colour, texture and chemical composition of jadeite from Japanese deposits.
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