|Color||Light yellow to brown.|
|Crystal form||Trigonal. Romboedric crystals or grainy masses.|
|Description||A rare mineral in Sweden. Occurs as crystals with quarts and calcite or as veins in some sulphide mines.|
|Associates||Quartz and calcite.|
|Notes|| Reacts with cold hydrochloric acid under
release of gas, not as violent as calcite.|
The density of ankerite separatest it from dolomite (2.8-2.9) and siderite (3.7-3.9).
After heavy firing, ankerite and siderite becomes magnetic, dolomite and calcite does not.
If a carbonatic sample is wetted with a weak acid solution of K3Fe(CN)6, some carbonates gets a blue color (Turnbulls blue) : calcite none, dolomite none, ankerite light blue, siderite dark blue.
|Locations|| The best locations are :|
| To carbonates index.
|| Mineral group index.
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