Size 7x5x4 cm. (description)
Size 5x3x2 cm.
Size 7x4x3.5 cm. (description)
|Mineral class||Carbonates : Cerrusite - Malachite - Hydrozincite group|
|Crystal system||Trigonal (rhomboedral).|
|Habitus||Often as derb, botryoidal or earthy aggregates. Often banded. More rarely as rhombohedral crystals with curved surfaces. Also as scalenohedral crystals.|
|Cleavage||Perfect in three directions, uneven fracture.|
|Hardness||4.5 - 5|
|Color||Colorless to white, yellow, green, blue, gray or brown.|
|Luster||Vitreous to pearly or silky, translucent.|
|Description||A secondary zinc mineral that is used as a minor zinc ore and for mineral samples.|
|Occurance||Forms in the oxidation zone of zinc or copper-zinc ores.|
|Associates||Pyromorphite, malachite, azurite, cerussite and hemimorphite.|
Named after the founder of the Smithsonian institute, James Smithson.|
Soluble in warm hydrochloric acid under effervescense (bubbles).
|Localities|| A rare mineral in Scandinavia.
Finland : (Sorry if the names are messed up, but I don't speak Finnish)
| To carbonates index.
|| Mineral group index.
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