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 first large suicide bombing campaign after the Second World War occurred in the 1980s during the Israeli occupation of Lebanon. The largest bombings occurred on 23 October 1983, a truck was driven into a US Marine base in Lebanon.