This sapphire gemstone features a beautiful blue color and stunning luster, making it an attractive choice for jewelry. It has a clarity grade of SI1, indicating slight imperfections that may be visible under magnification but are not overly noticeable to the naked eye. The gemstone has undergone heating treatment to enhance its color. With a hardness of 9 on Mohs' scale, it offers excellent durability suitable for various jewelry settings. The accompanying ALGT certificate provides authentication and additional assurance of the gemstone's quality and characteristics. Weight: 1.92 carats Gem Type: Sapphire Shape: Octagon Size: 9.7 x 6.0 x 2.8 mm Color: Blue Clarity: SI1 Luster: Stunning Treatment: Heated Hardness: 9 on Mohs' scale Certificate: ALGT ALL ITEMS ARE SHIPPED BY BPOST