The Logan sapphire is one of the largest blue sapphire gems known. It weighs 423 carats (84.6 g).
The Logan sapphire is one of the largest blue sapphire gems known. It weighs 423 carats (84.6 g).
洛根蓝宝石是已知最大的蓝色蓝宝石，重423克拉（84.6克）。
The Logan sapphire is one of the largest blue sapphire gems known. It weighs 423 carats (84.6 g).
洛根蓝宝石是已知最大的蓝色蓝宝石，重423克拉（84.6克）。