Lapis lazuli was used to make the eyebrows for the mask of king tut but it also had a number of uses in ancient Egypt

Lapis lazuli was used to make beads, amulets, and scarabs, as well as inlay in jewelry, particularly in the Middle and New Kingdoms. Cylinder seals carved from lapis lazuli were used to impress official seals, signatures, or religious inscriptions on wet clay. When rolled across the clay, these cylinders created very detailed impressions with both text and images. The seals themselves could be worn as necklaces, too. Egyptians it to create blue cosmetics.

Explanation:

Lapis lazuli was known to ancients as sapphire and was highly prized. The stone has been fashioned into magical amulets in the shape of an eye by the Egyptians, and often ornamented with gold. It was believed that the stone could impart ancient knowledge and the wisdom to use it. Many ancient civilizations prized lapis lazuli. To them, the stone had religious significance and reflected the high status of their rulers. People would set bracelets, brooches, rings, etc., with gems, the first letters of which conveyed a motto or sentiment. Lapis lazuli could stand for “good luck” or “love me,” depending on its usage and setting.

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.