This "Tomb Bead" necklace by Scott Mitchell measures 26 inches.
Egyptian faience (natively called tjehenet; modern archeological terms include sintered quartz, glazed frit, and glazed composition). It is not, technically, faience. It is a sintered-quartz ceramic, with a surface vitrification which creates a bright lustre of various colours; blue-green being the most common. Defined as a "material made from powdered quartz covered with a true vitreous coating, usually in a transparent blue or green isotropic glass", tjehenet is distinct from the crystalline compound Egyptian blue.
In ancient Egypt, objects created with faience were considered magical, filled with the undying shimmer of the sun, and imbued with the powers of rebirth. While faience is made of common materials__ quartz, alkaline salts, lime and mineral based colorants__it maintained important status among precious stones and metals. Faience simulated highly prized and rare semi-precious blue stones like turquoise, a shiny bright blue glaze__a color that was closely linked with fertility, life and the gleaming qualities of the sun. Some of the earliest faience objects made in Egypt were beads and royal tomb objects.