Vintage 70's Zodiac Necklace Gemini the Twins is in Excellent Condition! Dimensions: Pendant is 1 inch across and long Chain is 7.5 inches long closed Chain and Pendant together is 9 1/4 long. Got this necklace in the mid 1970's and its Gemini (the Twins). Anyone born between May 21st and June 21st is a Gemini! If you know someone who is Quick-witted, Creative, and Talkative (all Gemini traits) and loves the 1970's and Vintage Jewelry than this necklace and pendant are perfect for them!