Milky quartz, also known as snow quartz or white quartz, is a variety of the mineral quartz. It's characterized by its opaque to translucent white coloration and milky appearance. Here's a detailed definition:

Composition: This quartz type is composed of silicon dioxide (SiO2), the same chemical composition as other varieties of quartz. The milky appearance is often caused by the presence of microscopic fluid or gas inclusions, as well as tiny, dispersed mineral inclusions, such as rutile, chlorite, or other minerals.

Color and Appearance: Milky quartz typically appears white or milky in color, with a translucent to opaque quality. It may exhibit a soft, cloudy appearance due to the presence of microscopic inclusions or the scattering of light within the crystal structure. While predominantly white, milky quartz can also display hints of gray, cream, or pale blue.

Occurrence: Milky quartz is found in various geological environments around the world, including granite pegmatites, hydrothermal veins, and sedimentary rocks. It often occurs alongside other minerals, such as feldspar, mica, and other varieties of quartz.

Uses: It's primarily used as a decorative stone and for lapidary purposes. It is often polished into beads, cabochons, spheres, and other ornamental objects for use in jewelry, carvings, and sculptures. Its subtle color and milky appearance make it a popular choice for both contemporary and vintage-style jewelry designs.

Metaphysical Properties: In metaphysical and healing practices, milky quartz is associated with purity, clarity, and spiritual awakening. It is believed to promote mental clarity, enhance intuition, and facilitate spiritual growth. It's also thought to have a calming and soothing energy, helping to alleviate stress and promote a sense of peace and tranquility.