Dumortierite inclusions within quartz crystals produce the distinctive blue hue of this mineral. These inclusions can range from microscopic dispersions creating a light, almost hazy blue, to denser concentrations resulting in a deeper, more vibrant color. The intensity and distribution of dumortierite influence the final appearance, resulting in variations from pale, icy tones to deep, inky blues.
Historically prized for its aesthetic appeal, this vibrantly colored stone has seen use in jewelry and ornamental objects. Beyond its decorative value, it is often associated with tranquility, clear communication, and enhanced spiritual awareness in certain metaphysical practices. Its relative durability and attractive coloring make it a popular choice for lapidary work.