Acid Pall Malachite

Latin acidus, sour — sharing root with English acrid and acerbic. As a color modifier, acid implies a saturated-and-citric-and-zingy quality, the bright color of lemon-and-lime citrus-fruit-flesh and acid-yellow fluorescent-pigment surfaces. Sits at the bright-and-cool end of the grid, parallel to acidic and electric in usage.

Latin pallium, cloak-or-funeral-cover. As a color modifier, pall implies a cloaked-and-shrouded-and-funereal quality, the visual register of Roman-Catholic-and-Anglican-pall hand-cloaked-and-shrouded-and-funereal Roman-Catholic-and-Anglican-and-Orthodox-funeral funeral-pall-and-coffin-shroud-and-altar-cloth surfaces under Roman-Catholic-and-Anglican funeral-pall-and-coffin-shroud cathedral-incense light. Sits at the modifier-and-mood end of the grid, parallel to gloom and shade in usage.

A copper carbonate mineral — Cu₂CO₃(OH)₂ — that crystallizes as concentric green bands in oxidized copper deposits. Mined for ornamental stone since ancient Egypt, ground into pigment for medieval European painting, polished into the malachite columns of the Russian Hermitage. The color refers to a polished cabochon: a saturated, slightly muted green with the high shine of stone and the visible banding of growth rings.