National Geographic : 1950 Dec
© National Geographic Society + Flashing Yellow Sphenes Surround a Green Peridot; Red Spinels to Right Sparkling sphenes unfortunately are too soft for rings, split too easily in pendants. Sometimes called "evening emeralds," peridots have been treasured by Europe's cathedrals ever since Crusaders brought them from shores of the Red Sea. So much does the spinel resemble the ruby the two are often confused. Kodachroles by 'Paul1'ryor + Topaz, Shimmering with Reflected Light, Looks Like Sherry Solidified It is one of the hardest minerals. Slow, careful heat ing of usual golden shade may produce an attractive pink (right). Reddish topaz (left) is extremely rare. Larger bluish stone was found in Siberia; smaller one in Maine. Brazil yields finest topaz: yellow (lower left), orange (center), and squarish amber stone.