6. A gemstone, known as 'The Black Prince's Ruby', is presently set in one of the Royal jewels used during the coronation. In which of the Crown Jewels is this gemstone set?
From Quiz The Black Prince
Answer:
The Imperial Crown of State
The gemstone is actually a spinel weighing over 170 carats (34 grams). The earliest recorded owner was Abu Said, Moorish ruler of Granada, from whom, in the mid fourteenth century, it was taken by Don Pedro of Castile. Pedro was deposed by his brother Henry, who in turn was defeated by the Black Prince at the Battle of Najera in 1367. Pedro then presented the Black Prince with the 'ruby'. Later, Henry V wore it at Agincourt, and it was worn by various British monarchs including Henry VIII and Queen Elizabeth I. The Imperial Crown of State is normally worn at all State occasions except the coronation of the new monarch, although Queen Victoria did wear it for her coronation as she felt the Coronation Crown was far too heavy. Rubies are normally of greater value than spinels, but the Black Prince's Ruby has enormous historic value. Rubies are a rare variety of corundum, and spinels are a rare variety of magnesium aluminium oxide, but all red gemstones used to be referred to as rubies. There is an excellent picture of much of the Coronation Regalia, including all the above items, at http://www.british-towns.net/britain/jubilee/archive/regalia.htm.