Sentences with word «haematite»

NASA determined that they are made of an iron - rich mineral called haematite and others pointed out that similar marbles were to be found on Earth.

Once a ball starts to form, it builds up layer by layer as the iron precipitates out of the water to form the mineral haematite.

Simandou is a major new, high quality haematite deposit (with a targeted grade of 65 per cent iron) in proximity to the Atlantic Basin and the Middle East.

The marbles on Mars are thought to be almost pure haematite.

This striking bib necklace is made from larger plastic faceted teardrop beads, and haematite coloured bugle beads and clear round beads, all put together in an intricate woven design, l...

The upper panel presents a rich, dark red juxtaposed with a curved, terre verte area, while an orange - red haematite at the bottom envelops a deep blue, rounded form.

To investigate, Jérémie Palacci of New York University and his colleagues created plastic micro-spheres, each with a cubic patch of haematite, an iron oxide, on its surface, then dropped them into the liquid hydrogen peroxide.

It is generally agreed that Mars's colour is the result of a black form of iron called magnetite oxidising into the reddish - orange form called haematite.

Shining blue light on the particles caused the haematite cubes to catalyse the breakdown of nearby hydrogen peroxide into water and oxygen.

The engravings and pictures painted with ochre, charcoal and haematite are organised into about 50 groups, with some measuring up to 4 metres.

This is in accordance with the bottom - up modelling of ωo based on the haematite content in desert dust sources (Claquin et al., 1999; Shi et al., 2005).