Gemstone Identification

Which precious gemstone is the hardest natural substance on Earth, scores 10 on the Mohs scale, and is traditionally associated with engagement rings?

Which deep red gemstone is a variety of the mineral corundum, was called the 'king of gems' in ancient India, and is the birthstone for July?

Which green gemstone gets its color from chromium and vanadium, was Cleopatra's favorite gem, and is the birthstone for May?

Which blue gemstone is a variety of corundum, is the birthstone for September, and was believed by medieval clergy to symbolize heaven?

Which iridescent gemstone is formed inside the shells of mollusks, comes in white, black, and golden varieties, and is the birthstone for June?

Which gemstone displays a spectacular play of color with flashes of rainbow hues, is the national gemstone of Australia, and is the birthstone for October?

Which purple variety of quartz was believed by the ancient Greeks to prevent intoxication, and is the birthstone for February?

Which pale blue to blue-green gemstone is named after seawater, belongs to the beryl family alongside emerald, and is the birthstone for March?

Which opaque blue-green gemstone has been mined for thousands of years, was sacred to the ancient Egyptians, and is the birthstone for December?

Which deep blue gemstone, often flecked with golden pyrite, was ground into powder to create the precious pigment ultramarine used by Renaissance painters?

Which yellowish-green gemstone is found in volcanic rock and meteorites, was called the 'gem of the sun' by ancient Egyptians, and is the birthstone for August?

Which gemstone is highly prized in Chinese culture, comes in green, white, and lavender varieties, and has been carved into jewelry and figurines for over 5,000 years?

Which violet-blue gemstone was discovered in Tanzania in 1967, is found nowhere else on Earth, and is one thousand times rarer than diamond?

Which golden-yellow variety of quartz shares its name with a citrus fruit, is often confused with yellow topaz, and is the birthstone for November?

Which deep red gemstone is the birthstone for January, was used as a talisman by travelers in the Middle Ages, and comes in varieties including pyrope, almandine, and grossular?