røkkvarts

Røkkvarts is a mineral that belongs to the quartz group. It is known for its distinctive dark, smoky appearance, which can range from light brown to deep black. The color is attributed to natural irradiation and the presence of trace amounts of aluminum within the crystal lattice. Røkkvarts is found in a variety of geological settings, often in pegmatites, hydrothermal veins, and metamorphic rocks.

The name "røkkvarts" is derived from the Old Norse word "reykr," meaning smoke, and "kvars," meaning quartz, directly referencing its smoky hue. While visually similar to other smoky quartz varieties, its specific mineralogical characteristics and geological origins can sometimes distinguish it. It is often found in association with other common minerals like feldspar and mica.

Røkkvarts is primarily used as a gemstone and in decorative applications. Its dark color makes it popular for jewelry, especially for those who prefer a more subdued aesthetic. It is also sometimes used in ornamental carvings and objets d'art. While not as common as clear quartz, it is a recognized and sought-after variety among collectors and enthusiasts of natural stones. The hardness of røkkvarts is 7 on the Mohs scale, making it relatively durable. It is typically cut and polished to enhance its appearance.