Amethyst stone, 10.727 carats

Technical details: Type: Ametrine Weight: 10.727 carats Dimensions (mm): 12.57x10.63x9.22 Shape: Emerald Color: Bicolor Clarity: Eye-clean Transparency: Transparent Hardness: 7.0 Treatment: Untreated Origin: Unknown Certification: Certificate from Saudi Laboratory (MT) - Website (www.mtgl.com.sa) Ametrine is a unique type of quartz mineral characterized by natural dual color gradations that combine the purple of Amethyst and the yellow or orange of Citrine in a single crystal. This color variation results from differences in iron oxidation states inside the crystal and temperature variations during geological formation. Ametrine is relatively rare, and it is commercially mainly mined from the Anahi Mine in Bolivia.