Blue Agate - Smooth
Agate is the birthstone for the zodiac sign of Gemini, but is not a traditional birthstone for a birth month. Blue is associated with truth, loyalty and reliability. Its importance for healing has been recognized since the Golden Age of Greece. It was revered in ancient Indian and Chinese civilizations. Today, healers who work with color use blue stones for diagnosing and treating throat-related problems. And, poise and serenity have always been associated with blue light. Even the expression "feeling blue" comes from blue's cool, sedative effect. No wonder even people who don't "love blue" are drawn to people who do.