Gabion walls

Solidity, grounded, recycled materials, let light through...
Face inside with glass?

"Added to the walls, they [the gabion walls] form an inert mass that insulates the rooms against heat by day and cold at night. We chose local basalt that ranges from dark green to black and blends in beautifully with the landscape. The gabions are filled more or less densely as needed so that parts of the walls are very impenetrable while others allow the passage of light: natural light comes into the rooms during the day and artificial light seeps through the stones at night. You could describe our use of the gabions as kind of stone wickerwork with varying degrees of transparency, more like skin than like traditional masonry." -  the Herzog & de Meuron Dominus winery.
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Vary the thickness and materials depending on qualities required (more light, less light, more depth etc)Guide to gabion walls (enviromesh)
See also: Rock Office by a21 Studio

http://www.hy-tengabions.com/case_history.htm

NZ sites:
http://www.maccaferri.co.nz/afawcs0140261/ID=67/SID=465517339/productdetails.html