African blue lace sphere. 82mm or 3.25" approximately. 1lb 6ozs.
Blue lace agate is known for its delicate beauty, characterized by pale blue and white bands reminiscent of intricate lace. These layers form as silica-rich fluids fill cavities in cooling magma, creating a mesmerizing natural spectacle.
Blue Lace Agate is a microcrystallinevariety of quartz, belonging to the chalcedony family. Its primary constituent is silicon dioxide (SiO₂), with trace amounts of aluminum hydroxide (Al(OH)₃) and other minerals responsible for its characteristic blue coloration. The intricate banding pattern is formed by the gradual deposition of these minerals in alternating layers within gas-filled cavities involcanic rocks, typically basalts. This process, known as amygdaloidal filling, takes place over millions of years, resulting in the unique and aesthetically pleasing appearance of Blue Lace Agate.
