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(c) Mineral Picture courtesy of www.yuprocks.com
Mineral Picture courtesy of www.yuprocks.com

AragoniteCaCO3

Class: Carbonate
Hardness: 3.5 - 4
Streak: White
Lustre: Vitreous
Habit: Stalactitic aggregate of crystals or grains.
Colours: Colourless or white

  Crystal System: Orthorhombic
Cleavage: Pinacoidal
Fracture: Subconchoidal
Magnetism: None
Reaction with HCl: Strong

Identification in hand sample:
Stalactitic habit, hardness (greater than that of calcite) and colour.

Associations:
Occurs in carbonate-bearing blueschist metamorphic rocks. Associated with glaucophane, lawsonite, pumpellyite. Also forms at or near the surface in cave and hot spring deposits.

Industrial / ecomonic uses:
Same as calcite, however abundance is much much less than that of calcite, thus having little economic value.

  

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