May birthstone: Emerald
Zodiac sign: Gemini
Anniversary stone: 20th anniversary
Month flower: Hawthorn
Hindu month gem: Emerald
Meaning of dreaming with emerald: "Much to look forward to"
For more information about the history of birthstones, try The Curious Lore of Precious Stones by George Frederick Kunz, a fascinating compendium of all the powers that have been associated with gemstones through the ages.