Arfvedsonite Tower
- Regular
- $9.00
- Sale
- $9.00
- Regular
- $22.00
- Unit Price
- per
Arfvedsonite Properties |
|
What is Arfvedsonite? |
Arfvedsonite is a sodium amphibole mineral. It crystallizes in the monoclinic prismatic crystal system and typically occurs as greenish-black to bluish-grey fibrous to radiating or stellate prisms. It is a rather rare mineral occurring in nepheline syenite intrusions and agpaitic (peralkaline) pegmatites and granites as the Golden Horn batholith in Okanogan County, Washington (type locality for zektzerite). Occurrences include Mont Saint-Hilaire, Quebec, Canada; the Ilímaussaq complex in Southern Greenland; and in pegmatites of the Kola Peninsula, Russia. Its mineral association includes nepheline, albite, aegirine, riebeckite, katophorite, and quartz |
Crystal System |
Monoclinic |
Crystal Habit |
Fibrous, radial prismatic aggregates |
Color |
Black, deep green on thin edges |
Luster |
Vitreous |
Streak |
Deep bluish gray, gray-green |
Hardness |
5-6 |
Cleavage |
Perfect |
Fracture |
Uneven |
Tenacity |
Brittle |
Density |
3.3 g/㎝³ |
Pleochroism |
Strong: Blue-greens, yellow-browns, gray-violets |
Healing |
None known. |
Origins |
United States, Canada, Greenland, Russia |
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