Opal
Specimen ID: BT-W3B-XU
Opal : SiO2·nH2O
Mindat locality:
weight: 0.72 carats
Yellow-orange colour with "Contra Luz" effect (a vibrant multi-color flash that appears like "rainbows" within the gem when it is backlit).
Size: 6.09 mm
Mineral(s)
8,544 gemdatids have been issued as of 17th Aug 2025 8:42 am UTC