Determining the authenticity of an opal involves observing several key characteristics. Experts scrutinize the stone for signs of artificial construction, such as a lack of depth or uniform color patterns. A genuine opal exhibits play-of-color that appears three-dimensional and changes with the viewing angle. For example, a doublet or triplet opal, which are types of assembled opals, display a distinct layering effect when examined closely.
Verification is crucial because the value of a natural opal significantly exceeds that of its synthetic counterparts. Historically, opals have been prized for their unique optical properties and rarity. Accurate identification safeguards consumers against fraud and ensures a fair transaction. Understanding the nuances of opal authentication protects the gemstone’s heritage and market integrity.
