These are second earrings featuring blue sapphires (September birthstone). We have a limited quantity of sapphires in a perfect 3.5mm size. The platinum setting brings out the deep blue color. The stone's meaning includes "sincerity, compassion, and virtue," making it a recommended piece of jewelry to wear as a lucky charm. [TAKE-UP's commitment to Second Earrings] High quality metal (18K Yellow Gold or Platinum) that is less likely to cause allergies Large earring back that doesn't fall off easily Thick post to keep the piercing hole stable Easy-to-grip top Wide variety of designs * TAKE-UP products are Made in Japan, handcrafted by Japanese craftsmen. * We use natural stones. Please note that there may be some color variation. Materials Platinum 900, Blue Sapphire Size Height 3.5mm, Width 3.5mm * The lengths above are approximate. Product ID: 0645860