By Joel E. Arem, Ph.D., FGA, International Gem Society. Pyrope always occurs in series with other garnet species. Common, dark red garnets are a mixture of almandine and pyrope. Other mixtures also occur, in colors than can range from pale orange and pink to purple. Pyrope garnet, 10.53 cts, 13.5 x 13.5 x 10 mm, Congo, "Concave Round ...