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  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.
  • A superior lazulite specimen featuring deep blue crystals clustered harmoniously with lustrous brown siderite and clear quartz. The 7 cm matrix display shows excellent balance between minerals, clean crystal development, and presents attractively from multiple angles.

LAZULITE WITH SIDERITE & QUARTZ

Rapid Creek, Dawson Mining District, Yukon, Canada
7.6 x 7.2 x 2.1 cm
$175.00
$175.00
Shipping calculated at checkout.

ABOUT THE SPECIMEN

Groups of lazulite are clustered alongside well-developed siderite crystals and quartz points. Both sides of the piece display very well, and the proportions of all the constituent minerals make for a nice balance. It’s in great overall condition; the bit of damage that is there help keeps the price affordable.

 

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MORE INFO

Thick deposits of siderite and phosphatic ironstone in shale occur in the Rapid Creek Formation, which overlies a thick sequence of turbidite sandstones deposited during the Late Early Cretaceous - the most northerly known phosphorite at a paleolatitude of 75° N. Secondary phosphate minerals, including lazulite, crystallized in late-stage hydrothermal veins and breccia fillings from fluids scavenging magnesium, aluminum, and phosphorus from the enclosing iron-rich shales; fluid inclusion studies constrain formation temperatures to roughly 180–200°C. Iron substituting for magnesium in the monoclinic phosphate structure drives the deep indigo to azure blue color. Thirty-two phosphate minerals have been identified from the area, including ten new species, among which lazulite stands out as the most collectible and serves as Yukon's official gemstone. Crystals are tabular to short prismatic with a sharp pseudo-octahedral outline on dark phosphatic shale or siderite matrix, occasionally with augelite, gormanite, or wardite as associates - a paragenetic suite with no close parallel anywhere in North America. The locality is road-inaccessible Arctic tundra, collectible only during the brief subarctic summer and historically requiring helicopter-supported expeditions; most specimens in circulation today trace to a handful of dedicated collectors active in the late twentieth century. New recovery has slowed substantially, making fine crystals with complete terminations on undamaged matrix increasingly difficult to source.