This aquamarine's most striking feature was its unusually strong dichroism, displaying very deep blue and pale bluish green colours.
Read More
An unusually large faceted fuchsite, the chromian variety of muscovite, was identified and its green colour explained.
Read More
The uncommon occurrence of epigenetic malachite, as found in this quartz, can result in vivid green colour.
Read MoreA simple test easily detected dye treatment in fire opal.
Read More
At the AGTA and GJX shows, China Stone (Bangkok) marketed a selection of tiny, precisely cut natural gemstones.
Read More
Two small, near-colourless stones reportedly from Myanmar (0.11 and 0.24 ct; figure 1) were recently loaned to GIA for examination for identification.
Read More
