Rock Identifier
White jade bangle with gray accent bead (Likely nephrite jade (microcrystalline tremolite–actinolite); possibly white jadeite, identification requires testing) — gemstone
gemstone

White jade bangle with gray accent bead

Likely nephrite jade (microcrystalline tremolite–actinolite); possibly white jadeite, identification requires testing

AI-generated identification · may be incorrect

Translucent milky-white to pale gray, waxy to vitreous luster, tough interlocking fibrous texture, Mohs hardness about 6–6.5 (nephrite) or 6.5–7 (jadeite), no visible cleavage, specific gravity roughly 2.9–3.3. The smooth circular form is carved and polished.

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Physical properties

Translucent milky-white to pale gray, waxy to vitreous luster, tough interlocking fibrous texture, Mohs hardness about 6–6.5 (nephrite) or 6.5–7 (jadeite), no visible cleavage, specific gravity roughly 2.9–3.3. The smooth circular form is carved and polished.

Formation & geological history

Nephrite forms through metamorphism and metasomatism of ultramafic or carbonate rocks, commonly in Paleozoic to younger mountain belts; jadeite forms in high-pressure subduction zones. The gray bead may be another jade variety or a different stone.

Uses & applications

Used for bangles, beads, carvings, ornaments, and culturally significant jewelry; quality depends on translucency, even color, texture, and absence of fractures.

Geological facts

Jade is exceptionally tough because of its interlocking mineral fibers or granular structure. White nephrite is often marketed as “mutton-fat jade,” while untreated jadeite is commonly tested with density, spectroscopy, and magnification.

Field identification & locations

Field clues include cool feel, dense weight, waxy translucency, and resistance to scratching by steel; definitive identification needs refractive index, specific gravity, and microscopic or spectroscopic testing. Major sources include China, Myanmar, Canada, New Zealand, Russia, and Guatemala.