Minerals

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General Information

Calcite

One of the forms calcite can be found are stalactites. These are formed by sedimentation and can be found in stalactite caves.[1][2]

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Chemical & Physical Information

Trivial NameCalcite
Chemical NameCalcium Carbonate
Chemical FormulaCaCO3
Density2,71 g·cm-3
Molar mass?
Hardness3
Crytal systemPrism, rhombohedron
Unit cell?
Crystal habitCrystalline
FractureBrittle, conchoidal
CleavagePerfect [1011]
ColourColourless, white, bleu, yellow or red.
LusterGlass
StreakWhite
OpacityTranslucent to transparent.
SafetySafe
ExtraCan be fluorescent.
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Photos

Calcite

(3 cm)

Calcite

(5 cm)

Calcite

(2 cm)

Calcite

(2 cm)

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Sources

[1] Wikipedia (Calcite)

[2] Wikipedia (Stalactite)

[3] Specimen from my personal collection, photo taken by me.