Star sapphire stone, 7.119 carats

Technical details: Type: Star Sapphire Weight: 7.119 carats Dimensions (mm): 9.99x9.47x6.76 Shape: Cabochon Color: Blue Clarity: Eye-clean Transparency: Transparent Hardness: 9.0 Treatment: Untreated Origin: Unknown Certification: Certificate from Saudi Laboratory (MT) - website (www.mtgl.com.sa) Star Sapphire is a rare type of sapphire that shows a unique optical phenomenon known as "asterism" or "star effect." This phenomenon appears as a bright star with six rays (and sometimes twelve) that appears and moves on the polished surface of the cabochon-shaped stone when light falls on it. This effect is attributed to the presence of fine needle-like inclusions of rutile arranged in a cross pattern inside the sapphire crystal. Star sapphires are characterized by their beautiful blue color, but they can also appear in other colors such as gray, black, or pink, with the bright star.