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This is a natural turquoise nugget from the Kingman mining district in Arizona, USA. Measuring approximately 36 × 35 × 11 mm and weighing 19.3 grams, the nugget displays a bright blue colour with a light surface polish that enhances its natural vibrancy while retaining much of its original texture. The Kingman area is one of the oldest and most famous turquoise-producing regions in North America, known for its high-quality material and striking sky-blue tones.
Turquoise is a hydrated copper aluminium phosphate (CuAl₆(PO₄)₄(OH)₈·4H₂O) valued for its vibrant colour and cultural significance, particularly in Native American jewellery and Southwestern art. Kingman turquoise is especially prized for its rich blue hues, often with minimal veining, and is considered a benchmark for premium turquoise worldwide.
Collected in the 1970s, this piece is a fine example of Kingman turquoise with excellent colour and natural form. Its weight and size make it suitable for display as a specimen, cutting into cabochons, or use in lapidary projects, while its provenance adds collectible value for those interested in American gemstones
