Reverse Crystal Intaglio Charm Gemini Zodiac VINTAGEReverse crystal intaglio charm depicting two people, to represent the astrology sign of Gemini. The twins are gold in colour and is set against a mauve background, all within a sterling silver setting under domed glass. The other side states the astrological sign's quality, name, symbol and dates, against a gold colour background under a glass cabochon. Also known as sport crystals, Essex crystal, bubble charm, rosettes or cabochons, these charms were