Azcárate Quarry (Azkarate Quarry), Eugui, Esteríbar, Navarre, Spain

CaMg(CO₃)₂

Crystal System: trigonal
Colour: colourless, white, gray, reddish-white, brownish-white or pink
Lustre: vitreous, sub-vitreous, resinous, waxy, pearly
Habitus: rhombohedral
Fracture: sub-conchoidal
Cleavage: perfect on {10-11}
Hardness: 3½ - 4
Density:  2.876 g/cm³ 
Origin and geological occurrence: sedimentary origin. It derives from the diagenesis or hydrothermal metasomatism of limestone. Dolomite can also be found in metamorphic environment (as a component of some contact metamorphic rocks and marbles), in hydrothermal veins as gangue and in carbonatites and ultramafic rocks.

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Samples:

	5.11 Dolomite Crystalline aggregates of calcite and dolomite with a well developed rhombohedral and transparent crystal of dolomite. There is also some quartz. #carbonates   DA RIVEDERE
	5.12 Dolomite Cream-coloured rhombohedral crystals of dolomite with minor whitish baryte. Buca della Vena mine, Apuan Alps, Tuscany, Italy. #carbonates
	5.13 Dolomite Saddle-like crystals of dolomite with acicular crystals of millerite. #carbonates