Short-wave fluorescent illumination provides a useful tool to spot curved banding in flame-fusion synthetic sapphire.
Read MoreSome yellow sapphires contain unstable color centers. The following discussion outlines case studies of stones that faded after testing in the lab, and how color may be restored.
Read MoreAn apatite crystal appears to float, suspended over a rutile silk cloud in a star sapphire.
Read MoreDetection of heat treatment below 1200°C in ruby and sapphire can present challenges to gemologists. In this study, the authors heated Burmese ruby samples and detailed the features that help in the detection of heat treatment.
Read MoreA truth that's told with bad intent, beats all the lies you can invent.
—William Blake [1757–1827], Proverbs, Line 95
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