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The Mineralogical Record was first published in 1970, on the initiative of John S. White, a curator in the Smithsonian Institution's Department of Mineralogy, with the aim of filling the gap between scientific mineralogy journals (which began at that time to look more like solid state physics and chemistry than conventional descriptive mineralogy) and purely amateur magazines. [1]
While both reports contain a number of measurements, including dimensions, proportions, carat weight, color, and clarity, the Diamond Grading Report also includes a diamond plot (a graphic representation of the position and type of inclusions present in the diamond). Diamond reports from GIA (as well as other, for-profit sources) are now ...
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The Main entrance to the Mineral Show The presentation of a new edition of Mineralientage by the Keilmann's family. Mineralientage München is the largest mineral show in Europe, held in the Bavarian city of Munich (München in German), a few weeks after the Oktoberfest. It began in 1964 and celebrated its 50th edition in 2014. [1]
Since October 2000, mindat.org has been an important resource for mineral related fields. Its original purpose was to share information about minerals, their properties and where they are found. Today, it is the world's largest public database of mineral information supported worldwide by volunteers adding and verifying new information daily. [5]
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The Patricia is one of the few large gem-quality emeralds that remains uncut. [11] Also on display was the 563 carat (113 g) Star of India , the largest, and most famous, star sapphire in the world. It was discovered over 300 years ago in Sri Lanka , [ citation needed ] most likely in the sands of ancient river beds from where sapphires ...
The powdered gem mineral is then melted (or a metallic mixture directly burned in an oxygen flame) the residue of which then drips through a furnace onto a boule. The boule where the corundum or spinel cools down and crystallizes, spins and thus causes the curved striations, which are diagnostic for a lab-created gem: Natural corundum does not ...