History, Significance, Symbolism, Healing Benefits, and More of Blue Opal The Blue Opal gemstone is one of the most intriguing and mesmerizing semi-precious gemstones, renowned for its enthralling patterns and breathtakingly gorgeous blue hues. This gemstone is a member of the opal family, which is well-known for its color play and iridescence. The blue opal stone embedded in the jewelry provides calming and quiet sensations, which is why blue opal jewelry is so well-known among jewelry designers and jewelry lovers.