The Smithsonian has acquired an extraordinary 48.86-carat red topaz for the National Gem Collection. The Whitney Flame Topaz is one of the finest imperial, or “precious,” topaz gemstones in the world, ...
A flawless blue topaz gemstone - the largest of its kind - will be displayed in the Museum's Minerals Gallery from 19 October. The Ostro stone is the largest cut topaz to go on show at the Museum.
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