章節 239: New Ancient Seal Device

Opaline, a kind of carbonized silicone gem with 5 to 10 percent water percentage. At the Spell Department base at night, inside a standard hostel room, Gu Jun was studying a brilliant opaline. There were two kinds of opalines, ones with chatoyance and those without. The one he had contained chatoyant. It was oval in shape, 4.5 cm long and 2.1 cm wide. It came from western Australia. This was a particular request made by Gu Jun because he believed there was still a significant reason why they had landed close to Warburton when they returned from Dreamlands. Since opaline was not a crystalline stone, some of its structure would change color or even crack due to water loss but it would not affect its structural stability. 

An opaline of such quality, with brilliant colors, smooth cut and high water concentration fitted the requirement of the Pnakotic Manuscript perfectly.