Practical Gemology refers to the application of the knowledge of characteristics and properties of gemstones in identification or separation of synthetics and imitations. Diamond grading is included in practical gemology.
In November 1919 and January 1920, in what notoriously became known as the âPalmer Raids,â Attorney General Mitchell Palmer began rounding up and deporting so-called radicals. Thousands of people were arrested without warrants and without regard to constitutional protections against unlawful search and seizure.
The Second Period of Raids. A second phase of raiding began in 914, with the arrival of a large fleet of Viking ships in Waterford harbour. They promptly re-captured their settlement of Vadrefjord [Waterford] from which the Irish had expelled the first Vikings half a century earlier.