Mineral description : Holmquistite
Holmquistite as dark purple fibric aggregates in a matrix of finegrained magnetite.From Utö, Sweden. (size 10x6x2 cm) |
| Mineral class | Silicates : Inosilicates : Cummingtonite anthophyllite group |
| Chemical formula | (Li2Mg3Al2)Si8O22(OH)2 |
| Crystal system | Orthorombic |
| Habitus | Fibric aggregates, often in radiating aggregates, or as thin singular crystals. |
| Cleavage | |
| Hardness | |
| Density | |
| Color | Black with a purple tint, opaque. |
| Streak | |
| Luster | Silky. |
| Description | |
| Occurance | In lithium rich rocks. |
| Associates | Other lithium minerals. |
| Notes | Type locality : Utö, Södermanland, Sweden. |
| Locations | A rare amphibole.
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| To silicate index. |
Mineral group index. |
Main index. |
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Last changed : 2001-03-14