mineral

Turquoise (Blue Howlite imitation)

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Hardness: 5-6 (Mohs scale), Color: Sky blue to blue-green, Luster: Waxy to subvitreous, Crystal structure: Triclinic (usually massive), Cleavage: Perfect (rarely seen in massive samples), Specific gravity: 2.6-2.9

Identified April 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the infiltration of hydrothermal solutions and weathering of copper-rich rocks. It often occurs as veins or crusts in arid regions. Note: This specific heart-shaped specimen appears to be dyed Howlite or Magnesite, an common imitation.

Uses & applications

Predominantly used in jewelry, lapidary arts, and as a collector's stone. Higher quality material is used for cabochons and beads.

Geological facts

Turquoise is one of the oldest gemstones in history, used by Egyptian pharaohs and Aztec kings. It is unique among minerals for having a color named specifically after it.

Field identification & locations

Identify by its robin-egg blue color and dark spider-web inclusions (matrix). In the field, look for it in arid climates near copper deposits (Arizona, Iran, China). Imitations feel cooler to the touch than plastic but can be scratched by a steel needle.

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Nephrite Jade

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Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

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