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Then plant it in purequartz sand, never anything else.
2
The principal thing is to get the purequartz.
3
It may be purequartz; but oftener it is mixed with silicates from the rock containing the mineral.
4
There is also added some more fusible substance, such as feldspar, gypsum, or lime, together with some purequartz.
5
The best soil for it appears to be a purequartz sand, which in some places rests on black moss or mould.
6
To simulate sand transport on Mars, the scientists tumbled purequartz in a hermetically sealed flask for seven months, flipping each flask 10 million times.