CREATE TABLE table_62331 ("Month" TEXT, "15th- 20th century" TEXT, "U.S.  ( 1912 ) " TEXT, "U.S.  ( 2013 ) " TEXT, "Britain  ( 2013 ) " TEXT, "Hindu" TEXT)

In 1912 when the U.S used sapphire, what was the Hindu birthstone?
SELECT "Hindu" FROM table_62331 WHERE "U.S. (1912)" = 'sapphire'
SELECT "Hindu" FROM "table_62331" WHERE "U.S. (1912)" = 'sapphire'