Tanzanian sunstone, 5.337 carats

Technical details: Type: Tanzanian Sunstone Weight: 5.337 carats Shape: Oval Color: Orange Clarity: Unclassified Transparency: Translucent Hardness: 6.0-6.5 Treatment: Untreated Origin: Tanzanian Certification: Electronic certificate (PDF) from Saudi Laboratory (MT) - website (www.mtgl.com.sa) Sunstone is a gemstone belonging to the Feldspar group, known for a distinctive optical phenomenon called "Aventurescence," where a bright flash or metallic luster appears internally when the stone is moved. This effect is attributed to small inclusions of hematite, goethite, or sometimes copper, which reflect light. The color of Sunstone typically ranges from orange, red, golden, or yellow-green, and can be transparent to translucent. This stone forms in igneous and metamorphic rocks.