precision-referring to the 5.9 blue spinel which proved to b not spinel which the 1st appr id'd properly as not spinel but possibly sapphire because of refraction testing-he had the stone only 5 minutes & ruled out spinel-he then said maby sapphire but could not find any positive attachments to sapphire-that was all i took from him-i made an appointment with another appr. 2 days later & after almost 1.5 hrs of testing-observing & referencing books/charts he id'd the stone as well cooked synthetic sapphire & showed me why he came to his conclusion, as evidensed within the stones edges & interior-he did well-steve...