Source: Tritonal via Wikimedia Commons Blue Garnet
The blue garnet, which changes to purple at night In astrology, opal is a birthstone for Libra. Opal in general is the modern birthstone for October. While most common in white and most expensive in black, opal is quite popularly known to occur as blue stones, whether the blue is found among the play of colors or the body tone itself. Source: Dpulitzer via Wikimedia Commons Blue Opal The pricey blue stone was officially pronounced the state gem of California in 1985. The blue crystal ranges in shade from pale blue to bright blue. This blue jewel was named after the San Benito River, near who headwaters the blue gemstone was found.
Source: Rob Lavinsky, – CC-BY-SA-3.0 BenitoiteĪlmost exclusively found in California, benitoite is among the rarest and accordingly most expensive of blue gemstones. In astrology, the blue gem is traditionally held to be the birthstone for Taurus. Though traditionally the birthstone for April, this precious blue stone has been made the modern birthstone for September in the Western calendar, while the Hindu calendar designates sapphire as the July birthstone. Second only to diamond in hardness, this blue rock is a variety of corundum, a mineral that when red is called ruby. Sapphire is the ultimate representation of blue gemstones, and has consistently remained one of the four precious stones in the world, along with diamond, ruby and emerald. Source: Rob Lavinsky, – CC-BY-SA-3.0 Sapphire Owing to its rarity, the blue gem comes at a very expensive price. This blue crystal got its name from Serendib, the old Arabic name for Sri Lanka. While first discovered in green and is most commonly black, serendibite also occurs as grayish blue stones. Serendibite is a very rare glassy gemstone from Sri Lanka. Source: Salexmccoy via Wikimedia Commons Blue Serendibite An alexandrite that changes color from red to blue Alexandrite is a traditional birthstone for June. At night alexandrite appears reddish with incandescent light, while usually green or blue at daytime. The color of this gemstone changes depending on the source of light.
Source: commond via Wikimedia Commons AlexandriteĪlexandrite is a color-changing gemstone of the mineral chrysoberyl. In astrology, diamond is a birthstone for Aries. Diamond in general is the traditional and modern birthstone for the month of April, both in the Western and Hindu calendar. The color of the blue precious stone comes from the intrusion of boron into the otherwise clear mineral. The hardest of all gemstones, these blue rocks are known for their superb brilliance, owing to an extremely high refractive index. While diamond is most famous for its white variety, the precious stone also occurs as blue stones, which is among the most expensive of diamonds.
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