Deriving its name from the Sanskrit word meaning "fire" this November birthstone has long been believed to promote calm and faithfulness, to protect against enchantment and to cure insomnia. Traditionally found in colors ranging from pale yellow to golden orange and deep red of the finest Topaz, this gemstone occasionally occurs in shadows of pink and lavender. Blue Topaz, occurring in colors from pale to deeply-saturated hues is the gem to celebrate one's forth anniversary. Imperial Topaz is a suitable gift to commemorate the twenty-third wedding anniversary.