Statements (50)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:Iron_Age
|
| gptkbp:chemical_formula |
(Ca2, Mg, Fe)5(Al, Fe)2 Si8 O22(OH)2
|
| gptkbp:difficulty |
5-6 on Mohs scale
|
| gptkbp:has_cleavage |
Perfect in two directions
|
| gptkbp:has_color |
gptkb:Black
Dark green |
| gptkbp:has_specific_gravity |
3.0-3.4
|
| https://www.w3.org/2000/01/rdf-schema#label |
Hornblende
|
| gptkbp:is_associated_with |
gptkb:granite
gptkb:Biotite Plagioclase |
| gptkbp:is_characterized_by |
Aluminum content
Calcium content Double chain silicate structure Hydroxyl groups Iron and magnesium content Presence of potassium Presence of sodium |
| gptkbp:is_common_in |
gptkb:granite
gptkb:Rhyolite gptkb:Andesite gptkb:marble gptkb:volcano Gneiss Schist Slate Migmatite Eclogite Gabbro Peridotite Diorite Serpentinite Granodiorite Amphibolite Granulite Phyllite Schistose rocks Tonalite |
| gptkbp:is_found_in |
Volcanic rocks
Metamorphic rocks Igneous rocks Metasedimentary rocks |
| gptkbp:is_part_of |
Amphibole group
|
| gptkbp:is_used_in |
gptkb:jewelry
Construction Geology Decorative stone |
| gptkbp:luster |
Vitrous to dull
|
| gptkbp:bfsParent |
gptkb:Titanite
|
| gptkbp:bfsLayer |
5
|