Piemontite--30 x 22 mm. 20.5 cts. Named for its original discovery location in the Piedmont hills of Italy, piemontite is usually found in sprays of long, needle-like (acicular) crystals. In some cases, pieces are found which are solid enough to cut en cabochon, producing a sparkling, ruby-red gem. Piemontite's color derives from manganese, and it is distinguished from reddish epidote and clinozoisite by its manganese content (a minimum of 5%). This example originated in New Mexico.