Tanzanian sunstone, 1.397 carats

Technical details: Type: Tanzanian Sunstone Weight: 1.397 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 inside when the stone is moved. This effect is attributed to small inclusions of hematite or goethite minerals or sometimes copper, which reflect light. Sunstone's color usually ranges between orange, red, gold, or yellow-green, and it can be transparent to translucent. This stone forms in igneous and metamorphic rocks.