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Basalt with Augite crystals

Nepheline Syenite

£2.07 – £5.75 ex VAT

Amygdaloidal Lava With Chlorite Amygdales (Trap Rock) - Germany

These particular samples of basalt contain augite crystals and depending on which surface you look at on the samples you will be able to see the monoclinic prismatic structure of the augites which tend to be a very dark green or blue colour. The specimens come from Norway and are supplied in a white card tray with a label

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Basalt is a common extrusive volcanic rock, often having a fine grained texture usually being composed of dark FeMg (iron) minerals such as pyroxenes and amphibole crystals, although in some instances other minerals can be found such as quartz & feldspars.
These particular samples of basalt contain augite crystals and depending on which surface you look at on the samples you will be able to see the monoclinic prismatic structure of the augites which tend to be a very dark green or blue colour.The specimens come from Norway and are supplied in a white card tray with a label

Weight 130 g
Specimen Size

2" x 2", 3" x 2", 4" x 3"

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