Disclosed is a method of preparing a glass article, which comprises disposing a first glass layer on a fire-resistant substrate, applying at least one patterning material selected from the group consisting of a clay and a quartz powder on a preformed patterning region of the first glass layer to form a pattern, disposing a second glass layer on the surface of the first glass layer having the pattern to form a glass laminate, followed by drying, firing and cooling the glass laminate.