Which of the following is NOT typically a characteristic of high-grade lapis lazuli?

High-grade lapis lazuli is renowned for its rich, intense blue color, often described as a vibrant and deep hue that may have slight variations but is generally consistent. A key characteristic of high-quality lapis lazuli is the minimal presence of impurities, particularly calcite, which often appears as white or light-colored flecks within the stone. Consequently, options reflecting intense color, uniform coloration, and minimal impurities align with the standards of high-quality lapis lazuli.

The presence of visible calcite, however, is typically an indication of lower-grade lapis lazuli. Higher quality stones will have fewer or no calcite inclusions, as these can detract from the overall appearance and value of the stone. Therefore, the statement regarding visible calcite is not characteristic of high-grade lapis lazuli, making it the correct answer in this context.