- Henry David Thoreau (plato.standford.edu)
Henry David Thoreau (1817–1862) was an American philosopher, poet, environmental scientist, and political activist whose major work, Walden, draws upon each of these various identities in meditating upon the concrete problems of living in the world as a human being. He sought to revive a conception of philosophy as a way of life, not only a mode of reflective thought and discourse.
- Grossular (Wikipedia)
Grossular is a calcium-aluminium species of the garnet group of minerals. It has the chemical formula of Ca3Al2(SiO4)3 but the calcium may, in part, be replaced by ferrous iron and the aluminium by ferric iron. The name grossular is derived from the botanical name for the gooseberry, grossularia, in reference to the green garnet of this composition that is found in Siberia. Other shades include cinnamon brown (cinnamon stone variety), red, and yellow. Grossular is a gemstone.