Garnet (likely Almandine, Pyrope, or a blend)

Hardness: 6.5-7.5 on Mohs scale. Color: Deep red, reddish-brown, orange-red. Luster: Vitreous (glassy) to resinous. Crystal Structure: Isometric (typically dodecahedral or trapezohedral). Cleavage: None (conchoidal fracture). Specific Gravity: 3.5-4.3.

Garnets form under a wide range of conditions deep within the Earth's crust. They are characteristic minerals of metamorphic rocks such as schist and gneiss, forming from the metamorphism of aluminum-rich sedimentary rocks or mafic igneous rocks. They can also occur in some igneous rocks like granites and kimberlites. Their formation is often associated with high pressure and temperature conditions. Geological Age: Ranges from ancient Precambrian to relatively modern Cenozoic, depending on the specific geological event.

Industry: Abrasives (sandpaper, blasting media, waterjet cutting), due to their hardness and sharp edges. Water filtration media. Jewelry: Widely used as gemstones, particularly the transparent and richly colored varieties. Different garnet species offer a broad spectrum of colors, including various reds, oranges, yellows, greens, and even some very rare blues. Construction: Less common, but some low-quality garnet might be used as aggregate.

The word 'garnet' comes from the 14th-century Middle English word 'gernet' meaning 'dark red', and from the Latin 'granatus' (from 'granum' - grain, seed) because of the resemblance of red garnets to the seeds of a pomegranate. There are six main species of garnet based on their chemical composition: Pyrope, Almandine, Spessartine (orange to brown), Grossular (green, yellow, pink, clear), Andradite (green, yellow, black), and Uvarovite (emerald green). Many garnets are mixed compositions of these end-members.

In the field, garnets are identified by their characteristic dodecahedral or trapezohedral crystal forms, their hardness (scratching glass), and their rich, often deep red color. They commonly occur as well-formed crystals embedded in metamorphic rocks. They can also be found in alluvial deposits due to their resistance to weathering. Common locations include India, Sri Lanka, Brazil, the USA (Idaho, Arizona, North Carolina), South Africa, and Russia. For collectors, well-formed, gem-quality crystals or polished cabochons and faceted stones are highly prized. The deep red color of the beads in the image strongly suggests a dark red garnet variety such as Almandine or Pyrope.