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06.10.2011 14:21 |
Class: Oxides and hydroxides.
Formula: Al2BeO4, complex oxides of beryllium and aluminum.
Hardness: 8.5.
Specific gravity: 3,7-3,72.
Color: greenish, bluish, ... |
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06.10.2011 14:09 |
Class: Silicates.
Formula: Al2Be3Si6O18, berillosilikat aluminum.
Hardness: 7.5-8.
Specific gravity: 2,67-2,71.
Color: pale blue, sky blue, greenish-blue.
Feature: ... |
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06.10.2011 13:55 |
Classes oxides
The chemical formula SiO2
Share of 4
Color is usually pale and gray, yellow and brown tones, rare - with a green tinge or blue.
Luster: glassy, ... |
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06.10.2011 13:37 |
Synonyms: aventurine quartz, Taganay, Iskrists, zlatoiskr, sunny rock.
Class: Oxides and hydroxides.
Formula: SiO2, silicon dioxide.
Hardness: 7.
Specific Gravity: ... |
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