Jade (likely Jadeite)

Hardness: 6.5-7 on Mohs scale for Jadeite, 6-6.5 for Nephrite. Color: The beads show a range of colors including white, light green, and a very subtle lavender or bluish-white, common for natural undyed jade. Luster: Vitreous to greasy. Crystal structure: Jadeite is monoclinic, while Nephrite is monoclinic. Both are typically found as tough, interlocking fibrous or granular aggregates, not distinct crystals. Both have excellent toughness. They do not exhibit cleavage in the traditional sense due to their interlocking structures, but rather a splintery fracture in Nephrite and granular in Jadeite. Specific Gravity: Jadeite (3.3-3.5), Nephrite (2.9-3.0).

Jadeite forms in high-pressure, low-temperature metamorphic conditions, typically in subduction zones within serpentinite rocks. Nephrite forms in regional metamorphic environments, often associated with serpentine or in contact metamorphic zones. The geological age of jade deposits can vary widely, from hundreds of millions of years to much younger formations. It's often found in areas with past or present tectonic activity.

Predominantly used in jewelry (beads, cabochons, carvings, bangles), ornamental objects, and sculptures due to its exceptional toughness and beautiful range of colors. Historically, it was also used for tools and weapons in many ancient cultures, especially in Mesoamerica and East Asia, because of its durability. It holds significant cultural and spiritual importance in many societies.

Jade is a cultural term referring to two distinct mineral species: Jadeite and Nephrite. While both are called 'jade', Jadeite is generally rarer, harder, and often more vibrant in color, making it typically more valuable, especially the imperial green variety. The beads in the image, with their pastel green, white, and subtle lavender tones, are characteristic of natural, often un-dyed, Type A jadeite. Ancient cultures, particularly in China and Mesoamerica, highly valued jade for its beauty, rarity, and believed protective properties.

In the field, raw jade often appears as massive, tough, fine-grained aggregates. For polished items like these beads, identification relies on color, luster, toughness, and density. It feels cool to the touch and has a distinct 'clunk' when gently tapped against another piece of jade, due to its density and toughness. It's commonly found in Myanmar (Burma) for Jadeite, and in various locations for Nephrite including Canada, Russia, China, and New Zealand. Distinguishing between Jadeite and Nephrite often requires gemological testing of refractive index and specific gravity, but experienced eyes can often differentiate based on luster and texture. Be aware of jade simulants (like serpentine, quartz, or dyed chalcedony) and treated jade (dyed or polymer-impregnated Type B and C jade).