Garnet (likely Pyrope or Almandine)

Hardness: 7-7.5 on Mohs scale (for most garnets); Color: Deep red (pyrope/almandine variety most common in jewelry, but can be orange, green, brown, black, purple, or even colorless); Luster: Vitreous to resinous; Crystal structure: Isometric (dodecahedral or trapezohedral crystals); Cleavage: None (fracture is conchoidal to uneven); Specific Gravity: 3.1-4.3, varying with composition. The beads in the image are faceted, enhancing their luster and brilliance.

Garnets are a group of silicate minerals that form under a wide range of geological conditions, primarily in metamorphic rocks like schists and gneisses, but also in igneous rocks like granite and peridotite. They crystallize at high temperatures and pressures deep within the Earth's crust or mantle. Their geological age varies widely depending on the specific rock formation they are found in, ranging from Precambrian to Cenozoic.

Industry: Used as an abrasive (sandblasting, waterjet cutting, sandpaper) due to its hardness and sharp fracture; Jewelry: Popular gemstone, especially red varieties, used in rings, necklaces, bracelets, and earrings. The faceted beads in the image are clearly intended for jewelry. Construction: Sometimes used as a filtration medium. Collecting: Sought after by collectors for their varied colors and crystal forms.

Garnets have been used since the Bronze Age as gemstones and abrasives. Historically, red garnets were thought to illuminate the night and protect their owners from evil. They are often associated with love, passion, and energy. The term 'garnet' comes from the Latin word 'granatus,' meaning 'grain' or 'seed,' referring to the resemblance of some garnet crystals to pomegranate seeds.

Field Identification: Garnets often form distinctive dodecahedral or trapezohedral crystals. Their hardness allows them to scratch glass and most common minerals. The deep, rich color and lack of cleavage are also key indicators. Common Locations: Found globally, with significant deposits in India, Sri Lanka, Brazil, the Czech Republic, USA (Arizona, Idaho, Montana), and parts of Africa. Tips for Collectors: Look for well-formed crystals in metamorphic rocks. Rough garnet is often found in alluvial deposits. For jewelry, the deep red pyrope and almandine varieties are very popular. These beads are polished and faceted, making specific crystal identification difficult without examining the rough material, but the color is indicative.